You are correct, registered members cannot change the title of a thread if they are only replying. Indeed, the only way to change the title of a thread throughout the entire forum system is to take a stroll through the database. ;)
The newest version of Invision, v.1.3, is a little nicer, imho. With it, the independent threads are listed by search engines, and search engine bots can be given members status. However, the only downfall is that php includes are not allowed unless you perform some major modifications, modifications which are more complicated than they were with < 1.3 versions.
I'd also like to add that I really like this skin. :)
The newest version of Invision, v.1.3, is a little nicer, imho. With it, the independent threads are listed by search engines, and search engine bots can be given members status. However, the only downfall is that php includes are not allowed unless you perform some major modifications, modifications which are more complicated than they were with < 1.3 versions.
I'd also like to add that I really like this skin. :)