Debian (in vmware) sometimes starts highlighting all text and essentially "freezes"

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http://unix.stackexchange.com – I have Debian 6.0.6 on vmware player. I notice once in a while the mouse just selects everything - like starting from some point to wherever my mouse is currently at. I can't unselect or press any buttons, except right click. And then I still can't select anything, but if I right click the context menu goes away. I know this is really localized, but if someone has seen this issue and can point out where it's from I can make the title more general. After a while the selection goes away and I can click again. I can send signals via VMware but it doesn't seem to help (just got to wait). Any idea (HowTos)