Re: Fatal Error?
The problem is that your script is encoded with an older (version 5.2 or earlier) version of Zend Guard/Zend Optimizer, and is not compatible with the current version. Zend has stated that they will not fix the problem; there will be no compatibility with version pre-5.3 going forward. You will need to find a version of the script encoded for version 5.3 and re-install your site.
(Note: configuration files and databases should still be compatible, it's only the encoded script that's the problem.)
“Beware of bugs in the above code; I have only proved it correct, not tried it.” --Donald Knuth
"It was as if its architects were given a perfectly good hammer and gleefully replied, 'neat! With this hammer, we can build a tool that can pound in nails.'" -- Alex Papadimoulis (on TheDailyWTF.com)