Added some improvements to how the browser version is determined, based upon...

Added some improvements to how the browser version is determined, based upon the suggestions of 'hobbit' in [1101].

src/jquery/jquery.js

@@ -1799,7 +1799,7 @@ new function() {
 
 	// Figure out what browser is being used
 	jQuery.browser = {
-		version: b.match(/.+[xiae][\/ ]([\d.]+)/)[1],
+		version: b.match(/.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/)[1],
 		safari: /webkit/.test(b),
 		opera: /opera/.test(b),
 		msie: /msie/.test(b) && !/opera/.test(b),