I migrated my virtual domains from an old centos server to a new centos 5.3 server Linux 2.6.18-164.el5 on x86_64. The new server is a clean install from script. I restored the domains from a new backup of the old server domains. The users and web pages all transferred properly, but scripts using mysql are failing. (webcalendar, phpbb and one of the help desk scripts.) After a little diggind, it appears that all the old scripts fail when accessing mysql.
I created a new webcalendar in another domain, and it works correctly.
Is there a known issue with backups? Hopefully there is something simple I've missed.