For the last couple of weeks, whenever I close a game window, my other instance of Google Chrome (version 21.0.1180.83 m) that I invariably have open, will freeze and look like the image below. I can get round it by quickly scrolling up and down the page, or by clicking on a shortcut to another page, but it seems something isn't right for this to be happening. Anyone seen simiar and know what the problem/solution might be?



Thanks