Frequent Floating Point Exception/Div 0 Error in Tor Browser alpha
https://lists.torproject.org/pipermail/tor-qa/2012-July/000027.html reports a floating point exception in Tor Browser-alpha. tagnaq also reports frequent crashes.
I was able to reproduce this as well. It is due to the rewritten FF14 version of the pipeline randomization patch, where I was not as careful as I should have been when using the % operator..