Lion crashes and freezes, but mouse can move.

I have a 15'' MacBook Pro from late 2010. 2.4 Ghz i5 with 4 GB RAM.
I installed Lion the day it came out and I've been experiencing the same weird freezing problem.
I tried to keep track of when it would freeze (as in what apps were open and such) but it has happened in all sorts of conditions. It's frozen probably 6 times now and 4 times were watching a video on full screen safari. One was when I booted from sleep, and another was just in Finder.
I have already reinstalled Lion once (holding Cmd+R at the boot screen), but the issue still happens.
What happens is that the application I'm running (mostly Safari) crashes and goes to the beach ball. When I force quit it, it asks if I want to report the issue (I do) and then after that the system freezes. The odd thing is that I can move my mouse around. Many times I've just force shut down from there. But one time I just pressed the power button and it asked if I wanted to shut down. When that happened, it shut down but stayed at a white screen with a grey loading circle thing (it's moving) and just stayed there for over an hour before I force shut down again.
I was wondering if anyone had the same problem and if anyone knew how I could fix it??
Thanks in advance for your help!

Hi sherwu,
there are several ways to fix this problem described in this thread:
https://discussions.apple.com/thread/3191083?start=0&tstart=0
Having the same issue with the same 15" model the easiest and working fix for me was to deactivate the automatic graphic switching in the energy saving panel in the system preferences.
farbschmelz

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    Message was edited by: lkrupp

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