I just received my FEZ Cobra board with 4.3" LCD. The only program i could get to work was the blinking led. every other example i tried failed. I was getting so pissed i was ready to whip it against the wall.
Mainly because i was so excited about getting it and nothing was working.
I then read this, and it solved all my problems, now the demos are working.
http://www.tinyclr.com/forum/12/3617/
I figured that since i just got the kit they would have loaded it up with the latest software. This was not the case. Lesson here, NEVER ASSUME anything !