Ok, I have seen several of these posts but no one ever gives a straight clear answer to why or how to correct the problem. Here is my situation:

If i create a new FLA file on my Mac and publish it works fine. However, if i use a .fla file that was created on a PC and try to publish then Flash CTD's on me. (Crashes To Desktop)

Steps i have unsuccessfully taken:

1) Completely Un-install and Re-install CS3
2) Clean Out My Preferences
3) Verify Preferences
4) Repair Preferences

To no avail have i been successful. Any help is welcome with open arms.
TIA