I'm running a vded server through GoDaddy, and I've managed to modify my mod_security rules to accommodate most of the things that WordPress needs to run properly, until this issue.
Whenever I try to add a catagory through any interface in the blog I get this error in my httpd_error_log
[Mon Jan 12 09:30:24 2009] [error] [client <MY IP>] mod_security: Access denied with code 406. Pattern match "!(^$|^application/x-www-form-urlencoded$|^multipart/form-data|text/xml)" at HEADER("Content-Type") [severity "EMERGENCY"]
This means that the Content-Type that is being requested is not matching any of the acceptable values in the security rule. Does anyone know what the Content-Type of this request is? It will be cake to add it to my ruleset once I know what it's looking for.