At the top of every page, this code appears. From what I can tell by looking at the source, the php tag was never opened so it's processed as plain text. I can fix it, but I just can't seem to find which file this code is in. Anyone which file this code is located in?

This looks like the functions.inc of the Spam-X plugin, i.e. /path/to/geeklog/plugins/spamx/functions.inc

It probably was corrupted during upload, so try re-uploading a fresh copy.

bye, Dirk