We bought a dedicated server for the MTU.Community Forums to make them faster. I'm sorry this problem is now happening. It has something to do with the version of PHP and the Optimizer that was installed. We pay to have this web server managed by the hosting company, not our web master.
We thought this "Zend Optimizer" problem had been fixed by our web hosting company. I'll submit another ticket on this with jadavia's error message. This is a new hosting company for us, and their not having solved this problem is very disturbing to us.
Thanks for your reports and patience as we continue to work on solving this. 