My ASP.NET page is experiencing rendering issues in Chrome. When a certain block on the page becomes smaller due to the grid's elements, the background does not completely refresh and leaves part of the previous rendering until I change tabs and return. The same issue occurs when blocks become visible and then hidden. How can I force a re-render of the background? I am using UpdatePanel with Chrome version 24.0.1. Has anyone encountered this problem and found a solution (possibly related to a z-index CSS problem)? Any help would be appreciated...