Comment 1 for bug 492936

I've seen this at FUDCon sporadically on different machines, but I'm not exactly sure what's causing it. Maybe you could try following these instructions from Strawberry to see whether it helps:

# Press the <Escape> key at the blue screen, which appears for a second before the normal boot process starts. You'll be presented a short menu, at which you can directly press <Tab>, then just add the "nomodeset" argument in the appearing line, and then boot by pressing the <Enter> key.