Hi Seltiefriend,
Do you have a rather fast machine? I have seen PE10 working with the new drivers too shortly after I cleaned up my machine and it worked really fast then.
But when it slows down again PE didn't show the HD previews. Driver 337.88 didn't work for me, but maybe it depends also on the video card. Do you use a 32 or 64 bit system?
Regards, Jaap