When anaconda starts up on my dual head machine, the 2nd head remains completely black (I can move the mouse into it).

Confining the install to a single head is fine, but there are some elements that don't seem to handle it so well, and don't scale accordingly.

for example, the 'next' button that should be at the bottom right of the display is invisible. (alt & n still works)

The 'which devices to install on' screen is only half visible (see https://twitpic.com/7ii0g9).

at this point I gave up, and had to unplug the monitor & reboot to do the install.