diff --git a/README.md b/README.md
index 85d5edf6d..ae22f683b 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# lodash v3.0.1
+# lodash v3.1.0
 
 The [modern build](https://github.com/lodash/lodash/wiki/Build-Differences) of [lodash](https://lodash.com/) exported as [Node.js](http://nodejs.org/)/[io.js](https://iojs.org/) modules.
 
@@ -28,7 +28,7 @@ var array = require('lodash/array');
 var chunk = require('lodash/array/chunk');
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/3.0.1-npm) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/3.1.0-npm) for more details.
 
 **Note:**<br>
 Don’t assign values to the [special variable](http://nodejs.org/api/repl.html#repl_repl_features) `_` when in the REPL.<br>
@@ -39,8 +39,8 @@ Install [n_](https://www.npmjs.com/package/n_) for a REPL that includes lodash b
 lodash is also available in a variety of other builds & module formats.
 
  * npm packages for [modern](https://www.npmjs.com/package/lodash), [compatibility](https://www.npmjs.com/package/lodash-compat), & [per method](https://www.npmjs.com/browse/keyword/lodash-modularized) builds
- * AMD modules for [modern](https://github.com/lodash/lodash/tree/3.0.1-amd) & [compatibility](https://github.com/lodash/lodash-compat/tree/3.0.1-amd) builds
- * ES modules for the [modern](https://github.com/lodash/lodash/tree/3.0.1-es) build
+ * AMD modules for [modern](https://github.com/lodash/lodash/tree/3.1.0-amd) & [compatibility](https://github.com/lodash/lodash-compat/tree/3.1.0-amd) builds
+ * ES modules for the [modern](https://github.com/lodash/lodash/tree/3.1.0-es) build
 
 ## Further Reading
 
@@ -97,7 +97,7 @@ lodash is also available in a variety of other builds & module formats.
  * [_.bind](https://lodash.com/docs#bind), [_.curry](https://lodash.com/docs#curry), [_.partial](https://lodash.com/docs#partial), &
    [more](https://lodash.com/docs "_.bindKey, _.curryRight, _.partialRight") support customizable argument placeholders
  * [_.capitalize](https://lodash.com/docs#capitalize), [_.trim](https://lodash.com/docs#trim), &
-   [more](https://lodash.com/docs "_.camelCase, _.deburr, _.endsWith, _.escapeRegExp, _.kebabCase, _.pad, _.padLeft, _.padRight, _.repeat, _.snakeCase, _.startsWith, _.trimLeft, _.trimRight, _.trunc, _.words") string methods
+   [more](https://lodash.com/docs "_.camelCase, _.deburr, _.endsWith, _.escapeRegExp, _.kebabCase, _.pad, _.padLeft, _.padRight, _.repeat, _.snakeCase, _.startCase, _.startsWith, _.trimLeft, _.trimRight, _.trunc, _.words") string methods
  * [_.clone](https://lodash.com/docs#clone), [_.isEqual](https://lodash.com/docs#isEqual), &
    [more](https://lodash.com/docs "_.assign, _.cloneDeep, _.merge") accept callbacks
  * [_.dropWhile](https://lodash.com/docs#dropWhile), [_.takeWhile](https://lodash.com/docs#takeWhile), &
@@ -109,6 +109,6 @@ lodash is also available in a variety of other builds & module formats.
 
 ## Support
 
-Tested in Chrome 39-40, Firefox 34-35, IE 6-11, Opera 25-26, Safari 5-8, io.js 1.0.4, Node.js 0.8.28 & 0.10.35, PhantomJS 1.9.8, RingoJS 0.11, & Rhino 1.7RC5.
+Tested in Chrome 39-40, Firefox 34-35, IE 6-11, Opera 26-27, Safari 5-8, io.js 1.0.4, Node.js 0.8.28 & 0.10.35, PhantomJS 1.9.8, RingoJS 0.11, & Rhino 1.7RC5.
 
 Automated [browser](https://saucelabs.com/u/lodash) & [CI](https://travis-ci.org/lodash/lodash/) test runs are available. Special thanks to [Sauce Labs](https://saucelabs.com/) for providing automated browser testing.
diff --git a/chain/lodash.js b/chain/lodash.js
index 4f2eb07c6..62e07f580 100644
--- a/chain/lodash.js
+++ b/chain/lodash.js
@@ -57,14 +57,14 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  * `findLast`, `findLastIndex`, `findLastKey`, `findWhere`, `first`, `has`,
  * `identity`, `includes`, `indexOf`, `isArguments`, `isArray`, `isBoolean`,
  * `isDate`, `isElement`, `isEmpty`, `isEqual`, `isError`, `isFinite`,
- * `isFunction`, `isMatch` , `isNative`, `isNaN`, `isNull`, `isNumber`,
+ * `isFunction`, `isMatch`, `isNative`, `isNaN`, `isNull`, `isNumber`,
  * `isObject`, `isPlainObject`, `isRegExp`, `isString`, `isUndefined`,
  * `isTypedArray`, `join`, `kebabCase`, `last`, `lastIndexOf`, `max`, `min`,
  * `noConflict`, `now`, `pad`, `padLeft`, `padRight`, `parseInt`, `pop`,
  * `random`, `reduce`, `reduceRight`, `repeat`, `result`, `runInContext`,
  * `shift`, `size`, `snakeCase`, `some`, `sortedIndex`, `sortedLastIndex`,
- * `startsWith`, `template`, `trim`, `trimLeft`, `trimRight`, `trunc`,
- * `unescape`, `uniqueId`, `value`, and `words`
+ * `startCase`, `startsWith`, `template`, `trim`, `trimLeft`, `trimRight`,
+ * `trunc`, `unescape`, `uniqueId`, `value`, and `words`
  *
  * The wrapper function `sample` will return a wrapped value when `n` is provided,
  * otherwise an unwrapped value is returned.
diff --git a/collection/findWhere.js b/collection/findWhere.js
index b6f427d1f..a51ba5ae7 100644
--- a/collection/findWhere.js
+++ b/collection/findWhere.js
@@ -1,5 +1,5 @@
-var find = require('./find'),
-    matches = require('../utility/matches');
+var baseMatches = require('../internal/baseMatches'),
+    find = require('./find');
 
 /**
  * Performs a deep comparison between each element in `collection` and the
@@ -26,7 +26,7 @@ var find = require('./find'),
  * // => 'fred'
  */
 function findWhere(collection, source) {
-  return find(collection, matches(source));
+  return find(collection, baseMatches(source));
 }
 
 module.exports = findWhere;
diff --git a/collection/pluck.js b/collection/pluck.js
index 4bfd0159e..bb64092f1 100644
--- a/collection/pluck.js
+++ b/collection/pluck.js
@@ -1,5 +1,5 @@
-var map = require('./map'),
-    property = require('../utility/property');
+var baseProperty = require('../internal/baseProperty'),
+    map = require('./map');
 
 /**
  * Gets the value of `key` from all elements in `collection`.
@@ -25,7 +25,7 @@ var map = require('./map'),
  * // => [36, 40] (iteration order is not guaranteed)
  */
 function pluck(collection, key) {
-  return map(collection, property(key));
+  return map(collection, baseProperty(key + ''));
 }
 
 module.exports = pluck;
diff --git a/collection/where.js b/collection/where.js
index 9bf813a38..a00fc220f 100644
--- a/collection/where.js
+++ b/collection/where.js
@@ -1,5 +1,5 @@
-var filter = require('./filter'),
-    matches = require('../utility/matches');
+var baseMatches = require('../internal/baseMatches'),
+    filter = require('./filter');
 
 /**
  * Performs a deep comparison between each element in `collection` and the
@@ -29,7 +29,7 @@ var filter = require('./filter'),
  * // => ['barney', 'fred']
  */
 function where(collection, source) {
-  return filter(collection, matches(source));
+  return filter(collection, baseMatches(source));
 }
 
 module.exports = where;
diff --git a/index.js b/index.js
index 02c735279..020c5575b 100644
--- a/index.js
+++ b/index.js
@@ -1,6 +1,6 @@
 /**
  * @license
- * lodash 3.0.1 (Custom Build) <https://lodash.com/>
+ * lodash 3.1.0 (Custom Build) <https://lodash.com/>
  * Build: `lodash modern -d -o ./index.js`
  * Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
  * Based on Underscore.js 1.7.0 <http://underscorejs.org/LICENSE>
@@ -13,7 +13,7 @@
   var undefined;
 
   /** Used as the semantic version number. */
-  var VERSION = '3.0.1';
+  var VERSION = '3.1.0';
 
   /** Used to compose bitmasks for wrapper metadata. */
   var BIND_FLAG = 1,
@@ -769,7 +769,7 @@
 
     /**
      * Used as the maximum length of an array-like value.
-     * See the [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
+     * See the [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer)
      * for more details.
      */
     var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
@@ -827,14 +827,14 @@
      * `findLast`, `findLastIndex`, `findLastKey`, `findWhere`, `first`, `has`,
      * `identity`, `includes`, `indexOf`, `isArguments`, `isArray`, `isBoolean`,
      * `isDate`, `isElement`, `isEmpty`, `isEqual`, `isError`, `isFinite`,
-     * `isFunction`, `isMatch` , `isNative`, `isNaN`, `isNull`, `isNumber`,
+     * `isFunction`, `isMatch`, `isNative`, `isNaN`, `isNull`, `isNumber`,
      * `isObject`, `isPlainObject`, `isRegExp`, `isString`, `isUndefined`,
      * `isTypedArray`, `join`, `kebabCase`, `last`, `lastIndexOf`, `max`, `min`,
      * `noConflict`, `now`, `pad`, `padLeft`, `padRight`, `parseInt`, `pop`,
      * `random`, `reduce`, `reduceRight`, `repeat`, `result`, `runInContext`,
      * `shift`, `size`, `snakeCase`, `some`, `sortedIndex`, `sortedLastIndex`,
-     * `startsWith`, `template`, `trim`, `trimLeft`, `trimRight`, `trunc`,
-     * `unescape`, `uniqueId`, `value`, and `words`
+     * `startCase`, `startsWith`, `template`, `trim`, `trimLeft`, `trimRight`,
+     * `trunc`, `unescape`, `uniqueId`, `value`, and `words`
      *
      * The wrapper function `sample` will return a wrapped value when `n` is provided,
      * otherwise an unwrapped value is returned.
@@ -1647,7 +1647,7 @@
       }
       // Handle "_.property" and "_.matches" style callback shorthands.
       return type == 'object'
-        ? baseMatches(func, !argCount)
+        ? baseMatches(func)
         : baseProperty(func + '');
     }
 
@@ -2268,10 +2268,9 @@
      *
      * @private
      * @param {Object} source The object of property values to match.
-     * @param {boolean} [isCloned] Specify cloning the source object.
      * @returns {Function} Returns the new function.
      */
-    function baseMatches(source, isCloned) {
+    function baseMatches(source) {
       var props = keys(source),
           length = props.length;
 
@@ -2285,9 +2284,6 @@
           };
         }
       }
-      if (isCloned) {
-        source = baseClone(source, true);
-      }
       var values = Array(length),
           strictCompareFlags = Array(length);
 
@@ -3598,7 +3594,7 @@
         var length = object.length,
             prereq = isLength(length) && isIndex(index, length);
       } else {
-        prereq = type == 'string' && index in value;
+        prereq = type == 'string' && index in object;
       }
       return prereq && object[index] === value;
     }
@@ -3606,6 +3602,10 @@
     /**
      * Checks if `value` is a valid array-like length.
      *
+     * **Note:** This function is based on ES `ToLength`. See the
+     * [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
+     * for more details.
+     *
      * @private
      * @param {*} value The value to check.
      * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
@@ -5676,7 +5676,7 @@
      * // => 'fred'
      */
     function findWhere(collection, source) {
-      return find(collection, matches(source));
+      return find(collection, baseMatches(source));
     }
 
     /**
@@ -6053,7 +6053,7 @@
      * // => [36, 40] (iteration order is not guaranteed)
      */
     function pluck(collection, key) {
-      return map(collection, property(key));
+      return map(collection, baseProperty(key + ''));
     }
 
     /**
@@ -6424,7 +6424,7 @@
      * // => ['barney', 'fred']
      */
     function where(collection, source) {
-      return filter(collection, matches(source));
+      return filter(collection, baseMatches(source));
     }
 
     /*------------------------------------------------------------------------*/
@@ -9069,7 +9069,7 @@
      */
     var camelCase = createCompounder(function(result, word, index) {
       word = word.toLowerCase();
-      return index ? (result + word.charAt(0).toUpperCase() + word.slice(1)) : word;
+      return result + (index ? (word.charAt(0).toUpperCase() + word.slice(1)) : word);
     });
 
     /**
@@ -9420,16 +9420,41 @@
      * _.snakeCase('Foo Bar');
      * // => 'foo_bar'
      *
-     * _.snakeCase('--foo-bar');
+     * _.snakeCase('fooBar');
      * // => 'foo_bar'
      *
-     * _.snakeCase('fooBar');
+     * _.snakeCase('--foo-bar');
      * // => 'foo_bar'
      */
     var snakeCase = createCompounder(function(result, word, index) {
       return result + (index ? '_' : '') + word.toLowerCase();
     });
 
+    /**
+     * Converts `string` to start case.
+     * See [Wikipedia](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage)
+     * for more details.
+     *
+     * @static
+     * @memberOf _
+     * @category String
+     * @param {string} [string=''] The string to convert.
+     * @returns {string} Returns the start cased string.
+     * @example
+     *
+     * _.startCase('--foo-bar');
+     * // => 'Foo Bar'
+     *
+     * _.startCase('fooBar');
+     * // => 'Foo Bar'
+     *
+     * _.startCase('__foo_bar__');
+     * // => 'Foo Bar'
+     */
+    var startCase = createCompounder(function(result, word, index) {
+      return result + (index ? ' ' : '') + (word.charAt(0).toUpperCase() + word.slice(1));
+    });
+
     /**
      * Checks if `string` starts with the given target string.
      *
@@ -9689,7 +9714,7 @@
       if (guard ? isIterateeCall(value, chars, guard) : chars == null) {
         return string.slice(trimmedLeftIndex(string), trimmedRightIndex(string) + 1);
       }
-      chars = baseToString(chars);
+      chars = (chars + '');
       return string.slice(charsLeftIndex(string, chars), charsRightIndex(string, chars) + 1);
     }
 
@@ -9720,7 +9745,7 @@
       if (guard ? isIterateeCall(value, chars, guard) : chars == null) {
         return string.slice(trimmedLeftIndex(string))
       }
-      return string.slice(charsLeftIndex(string, baseToString(chars)));
+      return string.slice(charsLeftIndex(string, (chars + '')));
     }
 
     /**
@@ -9750,7 +9775,7 @@
       if (guard ? isIterateeCall(value, chars, guard) : chars == null) {
         return string.slice(0, trimmedRightIndex(string) + 1)
       }
-      return string.slice(0, charsRightIndex(string, baseToString(chars)) + 1);
+      return string.slice(0, charsRightIndex(string, (chars + '')) + 1);
     }
 
     /**
@@ -9957,7 +9982,9 @@
       if (guard && isIterateeCall(func, thisArg, guard)) {
         thisArg = null;
       }
-      return baseCallback(func, thisArg);
+      return isObjectLike(func)
+        ? matches(func)
+        : baseCallback(func, thisArg);
     }
 
     /**
@@ -10025,7 +10052,7 @@
      * // => { 'user': 'barney', 'age': 36 }
      */
     function matches(source) {
-      return baseMatches(source, true);
+      return baseMatches(baseClone(source, true));
     }
 
     /**
@@ -10522,6 +10549,7 @@
     lodash.some = some;
     lodash.sortedIndex = sortedIndex;
     lodash.sortedLastIndex = sortedLastIndex;
+    lodash.startCase = startCase;
     lodash.startsWith = startsWith;
     lodash.template = template;
     lodash.trim = trim;
@@ -10647,10 +10675,10 @@
     // Add `LazyWrapper` methods for `_.pluck` and `_.where`.
     arrayEach(['pluck', 'where'], function(methodName, index) {
       var operationName = index ? 'filter' : 'map',
-          createCallback = index ? matches : property;
+          createCallback = index ? baseMatches : baseProperty;
 
       LazyWrapper.prototype[methodName] = function(value) {
-        return this[operationName](createCallback(value));
+        return this[operationName](createCallback(index ? value : (value + '')));
       };
     });
 
diff --git a/internal/baseCallback.js b/internal/baseCallback.js
index 8868828d6..8543fc9a3 100644
--- a/internal/baseCallback.js
+++ b/internal/baseCallback.js
@@ -26,7 +26,7 @@ function baseCallback(func, thisArg, argCount) {
   }
   // Handle "_.property" and "_.matches" style callback shorthands.
   return type == 'object'
-    ? baseMatches(func, !argCount)
+    ? baseMatches(func)
     : baseProperty(func + '');
 }
 
diff --git a/internal/baseMatches.js b/internal/baseMatches.js
index 6462ccc53..b36c995a7 100644
--- a/internal/baseMatches.js
+++ b/internal/baseMatches.js
@@ -1,5 +1,4 @@
-var baseClone = require('./baseClone'),
-    baseIsMatch = require('./baseIsMatch'),
+var baseIsMatch = require('./baseIsMatch'),
     isStrictComparable = require('./isStrictComparable'),
     keys = require('../object/keys');
 
@@ -15,10 +14,9 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  *
  * @private
  * @param {Object} source The object of property values to match.
- * @param {boolean} [isCloned] Specify cloning the source object.
  * @returns {Function} Returns the new function.
  */
-function baseMatches(source, isCloned) {
+function baseMatches(source) {
   var props = keys(source),
       length = props.length;
 
@@ -32,9 +30,6 @@ function baseMatches(source, isCloned) {
       };
     }
   }
-  if (isCloned) {
-    source = baseClone(source, true);
-  }
   var values = Array(length),
       strictCompareFlags = Array(length);
 
diff --git a/internal/isIndex.js b/internal/isIndex.js
index 4d47d9a68..89bd88dcd 100644
--- a/internal/isIndex.js
+++ b/internal/isIndex.js
@@ -1,6 +1,6 @@
 /**
  * Used as the maximum length of an array-like value.
- * See the [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
+ * See the [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer)
  * for more details.
  */
 var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
diff --git a/internal/isIterateeCall.js b/internal/isIterateeCall.js
index 2f2797441..53d327e58 100644
--- a/internal/isIterateeCall.js
+++ b/internal/isIterateeCall.js
@@ -20,7 +20,7 @@ function isIterateeCall(value, index, object) {
     var length = object.length,
         prereq = isLength(length) && isIndex(index, length);
   } else {
-    prereq = type == 'string' && index in value;
+    prereq = type == 'string' && index in object;
   }
   return prereq && object[index] === value;
 }
diff --git a/internal/isLength.js b/internal/isLength.js
index 2ad8cf53e..8e1bf44e9 100644
--- a/internal/isLength.js
+++ b/internal/isLength.js
@@ -1,6 +1,6 @@
 /**
  * Used as the maximum length of an array-like value.
- * See the [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
+ * See the [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer)
  * for more details.
  */
 var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
@@ -8,6 +8,10 @@ var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
 /**
  * Checks if `value` is a valid array-like length.
  *
+ * **Note:** This function is based on ES `ToLength`. See the
+ * [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
+ * for more details.
+ *
  * @private
  * @param {*} value The value to check.
  * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
diff --git a/package.json b/package.json
index 831969a03..2bb8a945a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash",
-  "version": "3.0.1",
+  "version": "3.1.0",
   "description": "The modern build of lodash modular utilities.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/string.js b/string.js
index 1e24a40b7..f77794530 100644
--- a/string.js
+++ b/string.js
@@ -12,6 +12,7 @@ module.exports = {
   'parseInt': require('./string/parseInt'),
   'repeat': require('./string/repeat'),
   'snakeCase': require('./string/snakeCase'),
+  'startCase': require('./string/startCase'),
   'startsWith': require('./string/startsWith'),
   'template': require('./string/template'),
   'templateSettings': require('./string/templateSettings'),
diff --git a/string/camelCase.js b/string/camelCase.js
index 4fbf03f18..7f9979bc4 100644
--- a/string/camelCase.js
+++ b/string/camelCase.js
@@ -22,7 +22,7 @@ var createCompounder = require('../internal/createCompounder');
  */
 var camelCase = createCompounder(function(result, word, index) {
   word = word.toLowerCase();
-  return index ? (result + word.charAt(0).toUpperCase() + word.slice(1)) : word;
+  return result + (index ? (word.charAt(0).toUpperCase() + word.slice(1)) : word);
 });
 
 module.exports = camelCase;
diff --git a/string/snakeCase.js b/string/snakeCase.js
index cc475027b..f83a299cc 100644
--- a/string/snakeCase.js
+++ b/string/snakeCase.js
@@ -14,10 +14,10 @@ var createCompounder = require('../internal/createCompounder');
  * _.snakeCase('Foo Bar');
  * // => 'foo_bar'
  *
- * _.snakeCase('--foo-bar');
+ * _.snakeCase('fooBar');
  * // => 'foo_bar'
  *
- * _.snakeCase('fooBar');
+ * _.snakeCase('--foo-bar');
  * // => 'foo_bar'
  */
 var snakeCase = createCompounder(function(result, word, index) {
diff --git a/string/startCase.js b/string/startCase.js
new file mode 100644
index 000000000..8bdfa44e4
--- /dev/null
+++ b/string/startCase.js
@@ -0,0 +1,28 @@
+var createCompounder = require('../internal/createCompounder');
+
+/**
+ * Converts `string` to start case.
+ * See [Wikipedia](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage)
+ * for more details.
+ *
+ * @static
+ * @memberOf _
+ * @category String
+ * @param {string} [string=''] The string to convert.
+ * @returns {string} Returns the start cased string.
+ * @example
+ *
+ * _.startCase('--foo-bar');
+ * // => 'Foo Bar'
+ *
+ * _.startCase('fooBar');
+ * // => 'Foo Bar'
+ *
+ * _.startCase('__foo_bar__');
+ * // => 'Foo Bar'
+ */
+var startCase = createCompounder(function(result, word, index) {
+  return result + (index ? ' ' : '') + (word.charAt(0).toUpperCase() + word.slice(1));
+});
+
+module.exports = startCase;
diff --git a/string/trim.js b/string/trim.js
index 51db0ae66..6feaf66cf 100644
--- a/string/trim.js
+++ b/string/trim.js
@@ -35,7 +35,7 @@ function trim(string, chars, guard) {
   if (guard ? isIterateeCall(value, chars, guard) : chars == null) {
     return string.slice(trimmedLeftIndex(string), trimmedRightIndex(string) + 1);
   }
-  chars = baseToString(chars);
+  chars = (chars + '');
   return string.slice(charsLeftIndex(string, chars), charsRightIndex(string, chars) + 1);
 }
 
diff --git a/string/trimLeft.js b/string/trimLeft.js
index f7523d733..9ce7651ea 100644
--- a/string/trimLeft.js
+++ b/string/trimLeft.js
@@ -30,7 +30,7 @@ function trimLeft(string, chars, guard) {
   if (guard ? isIterateeCall(value, chars, guard) : chars == null) {
     return string.slice(trimmedLeftIndex(string))
   }
-  return string.slice(charsLeftIndex(string, baseToString(chars)));
+  return string.slice(charsLeftIndex(string, (chars + '')));
 }
 
 module.exports = trimLeft;
diff --git a/string/trimRight.js b/string/trimRight.js
index a5fc8575f..cc93346ab 100644
--- a/string/trimRight.js
+++ b/string/trimRight.js
@@ -30,7 +30,7 @@ function trimRight(string, chars, guard) {
   if (guard ? isIterateeCall(value, chars, guard) : chars == null) {
     return string.slice(0, trimmedRightIndex(string) + 1)
   }
-  return string.slice(0, charsRightIndex(string, baseToString(chars)) + 1);
+  return string.slice(0, charsRightIndex(string, (chars + '')) + 1);
 }
 
 module.exports = trimRight;
diff --git a/utility/callback.js b/utility/callback.js
index 98cf47eb1..e7b804708 100644
--- a/utility/callback.js
+++ b/utility/callback.js
@@ -1,5 +1,7 @@
 var baseCallback = require('../internal/baseCallback'),
-    isIterateeCall = require('../internal/isIterateeCall');
+    isIterateeCall = require('../internal/isIterateeCall'),
+    isObjectLike = require('../internal/isObjectLike'),
+    matches = require('./matches');
 
 /**
  * Creates a function bound to an optional `thisArg`. If `func` is a property
@@ -40,7 +42,9 @@ function callback(func, thisArg, guard) {
   if (guard && isIterateeCall(func, thisArg, guard)) {
     thisArg = null;
   }
-  return baseCallback(func, thisArg);
+  return isObjectLike(func)
+    ? matches(func)
+    : baseCallback(func, thisArg);
 }
 
 module.exports = callback;
diff --git a/utility/matches.js b/utility/matches.js
index 2d74e5efe..78cbbd4f0 100644
--- a/utility/matches.js
+++ b/utility/matches.js
@@ -1,4 +1,5 @@
-var baseMatches = require('../internal/baseMatches');
+var baseClone = require('../internal/baseClone'),
+    baseMatches = require('../internal/baseMatches');
 
 /**
  * Creates a function which performs a deep comparison between a given object
@@ -26,7 +27,7 @@ var baseMatches = require('../internal/baseMatches');
  * // => { 'user': 'barney', 'age': 36 }
  */
 function matches(source) {
-  return baseMatches(source, true);
+  return baseMatches(baseClone(source, true));
 }
 
 module.exports = matches;