Hey,
well i hade the same symptoms, things becoming progressively worse, with lot of crashes, no crash reports,...... Until it was practically impossible to do anything after the startup. In Safe mode, everything was ok, no crashes.
I found a solution on the net that works for me. Apparently, it has something to do with files in the Trash (as strange as this may sound). Open an Terminal window and type:
sudo rm -rf. ~/.Trash
You will have to type your admin password to proceed. This command does empty the trash, and after that, everything is normal again, no crashes at all for the last 3 hours.
Hope this helps for you too
Hans
