I'm seeing this problem as well, but only on my Mini9 and NOT the Mini10v
If I put PPT (2011) into slide show mode with an external display (projector, monitor, whatever) connected to it, the external monitor (full-screen) is completely black and the second monitor (on the mini) has the preview with the next slide on the right and the current slide on the left, the current slide is completely black.
If I run PPT in slide show mode without an external display, the laptop display is completely black.
In either case, I can see the pointer from the mouse move and if I push buttons on the mouse, the slide set advances. When I hit escape I go back to slide view and the desktop, etc comes back.
I do not see this when using the Mini10v, only on the Mini9. I also don't think that I saw this when using PowerPoint 2008 (I no longer have it) Both machines are running MS OFfice 2011 14.1.2 (latest update) and MacOS 10.6.7
Any ideas? My understanding is that the Mini9 and the Mini10v are essentially the same hardware with a different set of plastic. (and hard disk) so how would this happen?
Mini10v: Black, 2GB RAM, 160GHD 10.6.7/Windows 7 Dual-boot, NBI 0.8.4
Mini9: Black, 2GB RAM, 32GSSD, 10.6.7 NBI 0.8.5pre
MacBook Pro:15" Aluminum, 5GB RAM, 640GBHD, 10.6.7
iMac: 20" White 3GB RAM, 750GBHD, 10.6.7