When using Sitellite 4.2 in conjunction with Turck MMCache (http://turck-mmcache.sourceforge.net/),
it may be necessary do Disable MMCache for the Sitellite Directory, as there seems some incompatibility with MMCache's Optimizer.

This can be best achieved by putting

php_flag mmcache.enable "0"

in the topmost .htaccess file.

-- Wolfgang "r007" Herget