Action Script on OSX browsers issue

Has anybody else, using any browser on OSX, encountered an issue with action scripted tweening(through math formulas not tweening functions) and contents shifting when a window was opened or dragged over it? It’s difficult to explain but easy to replicate.
This is a template site…
Again, only Mac OSX users. For once OSX has a browser problem with flash and all PC browsers work fine.

Let the page load and on the start section where the images are connected by lines, pull any window over it and click back to the template window, I mean any finder window, browser window, and app window, it doesnt matter the contents all dissappear and come back in 5-7 seconds.

I cant figure it out. Any thoughts of why that would happen?