Hi Steve- Thanks for your reply and appologies for my not writing back sooner. My MAC was just in the shop getting repaired. The only thing different in my setup was that I had recently added another 512 MB ram- after that I started getting the error messages about the prefs. Also, was experiencing some glitchy behavior, for example when I would quit the program manually I would get an error message saying that the program After Effects had unexpectedly quit. My troubleshooting told me I may have bought faultly RAM, so I removed it and my error messages stopped as well. Then I put the RAM back in but in a different location and my machine ran just fine. Finally, with all 4 slots filled with RAM I found that I was getting the erratic behavior I’ve previously described. So I talked to Mac support and they decided to replace the logic board on my machine so all the RAM slots should be perfect…
Now, with my computer home, I trashed the old version of my program and its preexisting prefs, and did a reinstall. And the problem persists! So, what I took for a while to be a hardware issue may in fact not be. I do not remember manually altering anything with my AE setup before this started to happen. I run OS X version 10.2.8 on a G4 dual 1.4 GHZ machine. And I used the installer to install AE 5.5. Any ideas?
-Jason