I am running beta 6 fullscreen on a monitor connected to a Macbook Pro. When in that mode, if I open the About menu option from Parallels, the popup seems to appear behind the fullscreen display so I never see it. Also, I lose control of the guest OS until I manage to close the About window (I think ESC did it after I clicked the Parallels icon in the Dock).
Another problem when running fullscreen on a second monitor is that the mouse tracking doesn't seem to recognize when I leave the Parallels window. I essentially lose my mouse when I move it back to the Macbook LCD. If I task switch (CMD-Tab) to another running app I get the mouse back. Also, I can use CTRL-ALT to release the mouse after I have moved the mouse back to the built-in LCD but it all feels a little clumsy.
Finally, mouse tracking seems to lag a bit in fullscreen. I didn't notice it as much when running fullscreen on the built-in LCD. My external monitor runs at 1280X1024.
Another problem when running fullscreen on a second monitor is that the mouse tracking doesn't seem to recognize when I leave the Parallels window. I essentially lose my mouse when I move it back to the Macbook LCD. If I task switch (CMD-Tab) to another running app I get the mouse back. Also, I can use CTRL-ALT to release the mouse after I have moved the mouse back to the built-in LCD but it all feels a little clumsy.
Finally, mouse tracking seems to lag a bit in fullscreen. I didn't notice it as much when running fullscreen on the built-in LCD. My external monitor runs at 1280X1024.