refactoring client's decision

[Marc Lambrichs <suppressed>]

I've taken over some code for a client. They've built a framework that 
used to run under mod_perl and changed it later, because of problems 
they had - what problems remains unknown - to cgi. Ofcourse I'm curious 
why they changed it. Here's my view: they create a parent App::Handler 
and in every virtual host they create a Site::Handler which has 
App::Handler as base. My first guess is that under mod_perl you don't 
know which Site::Handler will be called. Ofcourse, at first, the handler 
you're actually pointing to will be called, but if you change the 
request to another virtualhost, the wrong handler will be called.

This would explain why it's running perfectly under cgi, because in 
every script call the correct lib path is defined.

So, my first question is: am I right?
Secondly, what if we're running the cgi under speedycgi?

Thx,
Marc