While I appreciate the feedback wolfstream, I think you're forgetting one vital thing here. Without the extension installed it is impossible for any php script to use eAccelerator functions, vB Optimise works exactly like vBulletin does for its datastore system for eAccelerator, and just about every other PHP script I've found that uses eAccelerator.
Please do not make claim there is a problem with the script when it was instead a problem with your eAccelerator setup. Ofcourse eAccelerator will work without the functions available in PHP, as it also works as a php optimiser in whole