Fix reliableHiddenOffsets test was not working properly when table cells have...

Fix reliableHiddenOffsets test was not working properly when table cells 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