Index: wp-includes/formatting.php
===================================================================
--- wp-includes/formatting.php	(revision 19932)
+++ wp-includes/formatting.php	(working copy)
@@ -1484,17 +1484,17 @@
 	$ret = " $ret "; // Pad with whitespace to simplify the regexes
 
 	$url_clickable = '~
-		([\\s(<.,;:!?])                                        # 1: Leading whitespace, or punctuation
-		(                                                      # 2: URL
+		([\\s(<>.,;:!?])                                   # 1: Leading whitespace, or punctuation
+		(                                                  # 2: URL
 			[\\w]{1,20}+://                                # Scheme and hier-part prefix
 			(?=\S{1,2000}\s)                               # Limit to URLs less than about 2000 characters long
 			[\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]*+         # Non-punctuation URL character
 			(?:                                            # Unroll the Loop: Only allow puctuation URL character if followed by a non-punctuation URL character
-				[\'.,;:!?)]                            # Punctuation URL character
-				[\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]++ # Non-punctuation URL character
+				[\'.,;:!?)]                                # Punctuation URL character
+				[\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]++     # Non-punctuation URL character
 			)*
 		)
-		(\)?)                                                  # 3: Trailing closing parenthesis (for parethesis balancing post processing)
+		(\)?)                                              # 3: Trailing closing parenthesis (for parethesis balancing post processing)
 	~xS'; // The regex is a non-anchored pattern and does not have a single fixed starting character.
 	      // Tell PCRE to spend more time optimizing since, when used on a page load, it will probably be used several times.