all sites on one server I own had their index.htm's defaced on aug 15, about 4:45. I did a little research and this happened to at least 400 other servers. Check your sites.
not sure of the exploit now, but I did have some sites running old versions of postnuke and I think that was probably the culprit. They overwrote all of the index files. Right now I'm switching between updating files and searching logs for information. I've been pissed off before, but never this pissed. I discovered the problem because I just ran my backup and noticed that more files than normal had changed. Also... EVERY TIME I've implemented spamassassin, I've had security issues almost immediately following the implementation. I implemented spam assassin again about two weeks ago. I'm wondering if it's a security hole in the software, or if I just end up pissing people off because of it. Holy cow. They hit over 6000 files. I had no idea I had that many index files.