Some clarification, the behavior I get is that the animation is not smooth. It is like the vetical retrace is missed sometimes. It could be that it do the flip at the correcttime, but that the loop sometimes takes too long so that one vertical retrace is skipped. Best Regards Peter Rönnquist __________________________________________________ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/ ------------------- To unsubscribe, mail caml-list-request@inria.fr. Archives: http://caml.inria.fr