Flash playback issue

After publishing my flash project and using it at website, people get a jumping flash playback, the text frames are no sync whit the images and they jump to fast. I tested it on several computers and all of them got the same problem, only here at my computer where i created the flash i dont have this issue.

Any ideias?

I found a workaround for it when i converted the text files to bitmap whit no AA.
But i still dont know why or what caused this problem, maybe is the TFL text support, any ideas?