Maia not working after upgrade from RC2 -> RC4

[hendry]

I've upgraded my RC2 including Maia to RC4. Now there are a couple of problems:

My subdomain antispam.domainname.xxx is not working again (see other post), but Maia is still available under servername.domainname.xxx/tools/antispam . When logged in new email is not shown in the filters anymore. So it looks like Maia isn't running anymore.

Is it possible to run the Wiki setup for Maia again or does anybody know what the problem is?