I love WMP12 accept for the fact that I have Windows 7 installed on an older laptop and it doesnt run smoothly. It glitches alot and my desktop shows through during these strobe like flashes.
My firefox and photoshop cs4 were doing the same thing but I changed compatability settings back to Windows XP service pack 2 and it fixed it in both. Went to do it to WMP 12 and it didnt allow me to. So I went to downgrade to 11 and thats when I started messing things up
EDIT: Tried above fixes... None of them worked. It started when I deleted part of the registry. I need to put it back somehow.