After starting a new session in my Debian Squeeze (6.0.4, always updated) running in a VM (VMWare Workstation) there comes the point in time where the left mouse click stops working, so that I cannot resize windows, bring them to front etc.
Sometimes I can switch window focus with the right click or with right-click and Control key held at the same time, but then it does not work at all.
Keys are accepted. I do not run anything special, just Emacs, Okular, Thunderbird and such stuff.
Unfortunately I cannot give any sequence of events which reliably creates the problem.
Is there a known fix to this problem (my googling efforts were not successful) or do i have to switch to KDE or LXFE?