I managed to load the page OK but the HTML wasn't complete and there was this error at the bottom:
Fatal error: Out of memory (allocated 9175040) (tried to allocate 256001 bytes) in /home/mathhome/public_html/qa-include/qa-theme-base.php on line79
So there is probably something you are doing in your theme that is overloading the server. Are you storing some big variables on each answer in your theme code?