Normally one is able to import project into a higher version with out any problem.
But sometimes for some unknown reason it does not work properly.
General advice is to finish especially big or compexe project in the version they started with.
I have never seen this, but I have heard about this before. And the error was fixed updating a video card driver.
Ann - lol, thanks for the advice - I normally would, but there's a back story in this case!!
Before I could go back in and make the change, my video drive failed - all I had was the single final DVD copy with the typo on it. In fact, it failed just as I plugged it back in to make the correction - talk about frustrating!! (I'm usually a bit better about keeping a back up.)
So, the drive was sent back to the company to get a quote on retrieving the data and in the meantime, we received the CS5 software and installed it. The good news was that the company looked at the drive and determined that it was a known firmware bug. They repaired it and sent it back at no charge, data intact! I hadn't expected to ever actually be able to go back in and fix the project - I just figured it was lost and we'd have to use what we had finished.