Index: sites/trunk/wordpress.org/public_html/style/trac/wp-trac.js
===================================================================
--- sites/trunk/wordpress.org/public_html/style/trac/wp-trac.js	(revision 2389)
+++ sites/trunk/wordpress.org/public_html/style/trac/wp-trac.js	(working copy)
@@ -103,6 +103,12 @@
 				$comment = $( this ).html();
 				if ( mentionsRegEx.test( $comment ) ) {
 					$comment = $comment.replace( mentionsRegEx, function( match, pre, username ) {
+						var matchInAttr = new RegExp( '=".*' + match + '.*"' );
+
+						if ( matchInAttr.test( $comment ) ) {
+							return match;
+						}
+
 						if ( -1 !== $.inArray( username, reservedTerms ) ) {
 							return match;
 						}