I just upgraded PLESK from 8.6 to 9.2.1 and it seems that the PHP doesn't work as Apache module anymore - it throws the php pages for "Save as... " instead.
I'm not sure how PLESK does the configuration of Apache files, but what was strange that I couldn't find any reference on "LoadModule php5module...".
PHP sites work however if I set it to fastcgi or cgi, but I would prefer finding the cause of this bug and fixing it.
I would appreciate any help on how could I re-enable PHP as apache module. BTW, it's a Debian 4 box.