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I'm running Chromium 18.0.997.0 (Developer Build 116462 Linux) Ubuntu 11.10 and occasionally when I open a context menu it will leave an artifact on the screen that is always above any application and will not go away unless I completely close down Chromium. This problem happens intermittently and is hard to reproduce, but it happens at least once a day and may be related to how long I have it open since I only ever close when there is an update or this problem occurs. I've attached an example of what happens. Anyone have any ideas if and how I can fix this?

enter image description here

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I have the same problem, but this seems to be a Chromium + Ubuntu related bug. This issue has been reported on the Chromium bug tracker and I suggest you vote for it (click on the star) or add any information to help identify/solve the issue. – Sicco Apr 10 '12 at 20:37

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