posts missing

[cecile]

I have a question. someone on my Forum has deleted more than 1500 posts. The problem is that I need to know who did it and I don't know how I could find out. Could someone tell me if there is any possibility to find out who did it? it's pretty urgent and I need to find out fast because a couple of days ago some posts disappeared again and it's been done by the same person.

Help!!

[Seg]

Search logs for strings related to post/topic removal
grep removetopic access_log|awk '{print $1}'
grep deletemsg access_log|awk '{print $1}'

Is register_globals on or off?
find / -name php.ini -type f -exec grep register_global {} \;