So I'm using Parallels on my external 1920x1200 LCD in full screen mode. Works great. Then I put the MBP to sleep and unplug it from my desk. Now when I try to get it to go to full screen mode on the internal LCD (MBP 17) it complains about not being able to change the res and to check my XWindows config. I'd like it to work properly without any fiddling
This is a none problem that they have (finally) agreed to fix for the next release. To work around it manually, just lower the resolution of your Guest OS to something no bigger then you MBP display.
