Freezing up since Lion

My MacBook Pro, is 6 months old and since adding Lion, it freezes when I attempt to do the simplist actions; wake from sleep or screensaver or adding a tab in safari. But running Photoshop and Bridge and 3 or 4 other applications doesn't bother it at all. The worst is when I wake it up, I have had to cold stop and start it at least 3 times this week. Is anyone else having this problem? Am I doing something wrong?

I'm having the same problem on my late 2008 MBP 15".  Never had a problem before installing Mountain Lion.   Now I have to reboot about 4-5 times a week.
My computer doesn't lock up completely.    But Wi-Fi stops (you see only one black line on the WiFi icon), the clock stops (I was wondering why it seemed so early earlier tonight - the clock had been stopped for two hours) and many, but not all applications are "not responding".    However, if I try to quit the applications that appear to be okay, then they also become "not responding".   I have to force shut each application and then I can reboot using the Apple>Restart... command.
One of the things I've noticed is that many times it's iTunes that has the "not responding" message when the other apps don't, even if I haven't used it.   I'm going to Quit iTunes and see if it still happens.  
I don't think it's heat related.  My computer feels no hotter than it ever did.
If 10.8.1 fixes this, I'm okay with it (although it was still sloppy for Apple to release with such a bug.)    But the question is whether Apple even knows about it, since they provide no mechanism for non-developers to report bugs.   

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