The issue is not the lapdocks, it is motorola's webtop 2.0 implementation. It is a bug in the screen saver embedded. If you dare go on the ICS leak, or be patient for the official ICS release coming up, you will get webtop 3.0 which is native android, and this will no longer be a problem. I had the issue a couple of times when I was on stock rom, but I updated and haven't had an issue since.
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