I have the same problem...I just put the same wallpaper as my Mac and just live with it until they fix it ( it looks like a picture on top of a picture but whatever...also I can't see my Mac icons)...I can't believe they didn't make this upgrade much smoother. My friend has Parallels and said it went very smooth with no problems. I don't know many people who want to download an iso...mount it and then install thru that. Maybe while in beta but not as a final release. Very sloppy VMWare!
Other small issues:
1) When minimizing a window a ghost window appears for a few seconds. Thats annoying.
2) Shutdown doesn't work from start button. I have to use the fusion shutdown.
On another note...
I am not sure why Microsoft thinks we want a flatter and flatter Windows with less and less and less but whatever. Seems to help as a virtualized OS.
Thanks,
Russell