Flash and vista problems

I have a movie clip with the prebuilt button components. Viewed on my computer running XP and Firefox, the clip looks fine. However, when viewed on a computer with Vista and IE7 the buttons flicker and show the editing view of the component (the selected_up, selected_over, etc. view).

I was wondering if someone knew why this was happening and/or if this was some problem with Vista. I tried running it on IE7 with XP and it worked fine. Maybe its just one computer? I hate IE.