Problem playing swfs after CS% installation

I am having an odd problem since CS5 was installed on my machine. I have several swfs that include a preloader. If I load one of these swfs outside of Flash, the preloader loads, but gets stuck at 38%. I can test from within Flash ok and it also works fine from within a web browser (IE to be specific).

It’s also machine specific (or at least profile specific). Other machines with the same install and OS don’t have the issue. A coworker had the same issue and was able to resolve it by creating a new profile. Any ideas would be appreciated.