Aggiornamento a 7.10 problemi con php5

[alfabetico]

Ho aggironato Ubuntu a 7.10 quindi ho reinstallato Apache2 -php5-mysql,
come da descrizioni in giro per il web, ma niente da fare apache2 funziona
mentre php5 non vuol sentire di andare, mi da questo:


Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, webmaster@localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.
Apache/2.2.4 (Ubuntu) PHP/5.2.3-1ubuntu6 mod_perl/2.0.2 Perl/v5.8.8 Server at localhost Port 80

Spero in qualche buon'anima mi dia un accenno.. grazie Livio