I have a new Macbook with 1 GB Ram running 10.4.6. I start up Parallels and start an XP VM. I switch to full screen mode. I do whatever for a couple of hours and then quit Windows. Once I return to Mac OS X, my active windows all have a strange artifcat around them. It looks like black lines with cross-hatching at the corners. The problem persists even after I quit Parallels. Unfortunately, I purchased Parallels shortly before the beta came out so I installed the beta almost immediately. I don't know if this problem is in the Stable version or not. I also can't remember if I have to restart or just logout to get the window artifact to go away. If this is an unknown problem, I can provide better details and a screen shot. I did a search and couldn't find anything like this. Otherwise, Parallels runs great.
