Xsun crashes on a CGSIX framebuffer.
To reproduce:
-do something which generates lotts of video access find / in an xterm
 for example, the trick is that it keeps updating the display
-switch to console
-crash

This happens if I use one or both the CGSIX cards in this machine.

Side note:
X doesn't lite the led of the compose key when you enter a compose
sequence.