I know this is a weird post for my blog, but this is for everyone out there troubleshooting their problems.
I was plagued by CS4's consistent crashing on my MacBook Pro, intel core. I had crash problems with the following actions: moving layers up or down by dragging; selection on a layer; trying to enter text. These were the solutions I attempted while searching the net:
1. bootup in 64 bit (holding down '6' and '4' keys while booting) - didn't work
2. booting up in safe mode (holding down shift key while booting), then reboot. Didn't work. I could use CS4 in safe mode, but who wants to switch back and forth all day?
3. Turn off file sharing. Delete anything listed in the Shared Folders section. Turn File Sharing back on. Log out, then Log back in - didn't work
4. In Photoshop, select Preferences->Performance, deselect 'Enable Open GL Drawing'. That did the trick.
I can now do all the above actions in 32 bit mode.
Gene Wilder, 83
8 hours ago