Tiger Server Admin does not see Web Config anymore

I had to replace the startup disk of a Tiger 10.4.11 server because of running out of disk space. So what I did was the following:

Carbon Copy Cloned the disk to an external FireWire drive. Tried to boot this external disk -> worked so far. Carbon Copy Cloner asked me if I wanted to repair permissions before cloning and I agreed.

Replaced internal disk with new one then booted external disk and Carbon Copy Clone'ed from the external Fire Wire disk (no repair permission this time) onto the new disk. Everything, well almost everything, worked. Only later I figured that there was a problem with some postfix / clamAV files having wrong ownership (belonging to UID 260 but should be owned by UID 82). However there is no user with ID 82 on my system but there is a user Clam Antivirus with ID 260. Mail did not work after a repair permissions because auf this! Changing file owner to id 260 fixed the mail problems. These were the only repair priv messages. 

But there is more trouble. Web Serving is extremely shaky. Sometimes the server flatly refuses to exist, other times the server accepts the connection but does not return an answer and again sometimes it works as it is supposed to do. Server Admin however does not see Web Config, telling me that there was nothing there.... Trying with command line serveradmin shows the following crash:

g4server_ROOT> serveradmin -d status web

Sending to web

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

<key>command</key>

<string>getState</string>

</dict>

</plist>

2008-01-23 08:55:12.134 serveradmin[644] Exception in doCommand: *** -[NSCFDictionary setObject:forKey:]: attempt to insert nil value

web:error = "NIL_RESPONSE_ERR (*** -[NSCFDictionary setObject:forKey:]: attempt to insert nil value)"

g4server_ROOT> 

I wasn't able to figure what went wrong, fs_usage did not reveal access to any suspicious file that might be corrupted. Logfiles do not contain helpful messages (at least not anything that helped me). I really do not want to reinstall the complete server, Any ideas what cold be the problem here an how I could resolve the issues?

Tiger 10.4.11 Server with all the System Updates available, Several name based virtual hosts being served. Server is behind a NAT router with port forwarding. Other services running: DHCP for the internal net, DNS to the public internet, Postfix for public mail reception.

Thanks for any help

---markus---