VB4 and server requirements
 

Can anybody confirm if the server requirements for VB4 have changed?

As far as I can see the only requirements are PHP 5.2 or greater and MySQL 4.1.0 or greater and a fairly generalised response to supported operating systems.

Is it safe to assume that if my server runs VB3 it will be able to run VB4?

Also* what caching mechanisms are fully supported in VB4?