In my apache error logs I find:
PHP Warning: [eAccelerator] This build of "eAccelerator" was compiled for PHP version 4.4.2. Rebuild it for your PHP version (4.4.2-pl1) or download precompiled binaries.\n in Unknown on line 0
PHP Warning: Unknown(): Unable to initialize module 'eAccelerator' in Unknown on line 0
This really annoys me, as I use XAMPP to save me from the trouble of compiling stuff like this myself. I would really like to use the accelerator.