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Hovering over the 42 causes the "detail" division to be displayed, but moving the cursor away causes only 42 to be repainted, leaving the rest of the division visible.
Bug is only triggered if overflow on the containing block (class "cell" in the example) is switched from hidden to visible on :hover.
The effect is present in at least google-chrome 11.0.696.57 beta (Linux SL6 gtk2-2.18.9-4), 11.0.696.48 beta (Linux Fedora 14 gtk2-22.0-1), and Safari 5.0.5 (6533.21.1) on Mac OS 10.6.7
Please attach a self-contained test case to this bug. Thanks.
Created an attachment (id=92198) [details]
*** Bug 62641 has been marked as a duplicate of this bug. ***
Created an attachment (id=147765) [details]
Attaching simplified test-case (spotted this bug myself and made this test before finding this report).
Swapping overflow of container AND swapping display of child node which is absolutely positioned apparently does this.
Created an attachment (id=147766) [details]
simplified test-cases' screenshot
Screenshot of above test-case. Same appearance in Safari 5.1.5 @ W7 64; Chromium 21 @ Ubuntu, Google Chrome 19 ...
This is still an issue for me in Chrome Version 29.0.1547.65 in Sept' 2013.
As reported in this stack issue, a workaround is to add -webkit-transform: scale3d(1,1,1); to force webkit to use the 3d rendering engine.