Few things here
Okay, PHP version is not the problem then...
Please put a copy of your System Information here.
Site Admin >> System Information
®olf
that is needed..
also all pages go thru index.php

..
I notice you have Cars loaded .. take that out unless you at like 1.5.7 or less.. in the summury I put a notice that it have not been updated 1.6.x and may cause issues.
ScriptDeploy is not the root.. it just makes css files ... if there is a bug I'll love to fix it
where is the
at the bottom of the page..
I looked in all browsers ... which one is it not showing? Which ones are you seeing the random blank pages...
At least for me there seems to be little to go off of.. is this solved? Cheers -Jeremy