We have a VMWare Fusion user running MAC OSX 10.6 host with a Windows XP guest who would end up with white boxes displayed instead of the correct menus. A reboot would fix it for a few hours, then it would happen again, requiring yet another reboot.
The way we fixed it is as follows.
On the guest Windows XP do the following.
I have a few users running Mail.app in Snow Leopard who have to send images to people. When they do so, it ends up embedded in the email, rather than shown as a separate attachment. To get around this, they have been zipping the images up and sending them, but this can be annoying and time consuming. To stop Mail.app embedding the images, follow these steps.
1.) Load the Terminal program
2.) Type the following command defaults write com.apple.mail DisableInlineAttachmentViewing -bool yes
You should now see any attached images appearing as a proper attachment!