Fix reliableHiddenOffsets test was not working properly when table ce…

…lls have borders, causing unnecessary slowness in some browsers. Thanks to matjas for his $.support test page.

src/support.js

@@ -147,7 +147,7 @@
 			jQuery.support.shrinkWrapBlocks = div.offsetWidth !== 2;
 		}
 
-		div.innerHTML = "<table><tr><td style='padding:0;display:none'></td><td>t</td></tr></table>";
+		div.innerHTML = "<table><tr><td style='padding:0;border:0;display:none'></td><td>t</td></tr></table>";
 		var tds = div.getElementsByTagName("td");
 
 		// Check if table cells still have offsetWidth/Height when they are set