I'm on Firefox 3.6.8/Win, and I have the same problem. It's more a problem with the browser itself (FF4 with retained layers should have no problems I guess).
This also happens when you abuse with shadows (text or boxes/divs).
edit: @joshuacc, since I can't reply directly to your comment: It probably depends on the machine resources. I'm on a 5y old notebook.
This also happens when you abuse with shadows (text or boxes/divs).
edit: @joshuacc, since I can't reply directly to your comment: It probably depends on the machine resources. I'm on a 5y old notebook.