0.9.2 supports HTTP authentication, meaning forums on HTTP password protected sites. For example some intranets do this. Note that this is different from HTTP post authentication which is the common way of user authentication on forums. You can have both HTTP auth and HTTP post authentications on a single forum.
Also various minor fixes and enhancements as always are included.
If you wonder what happened to 0.9.1, it was also released but was just a minor release fixing
some bugs not worth of mentioning here.