I've had good performance with my Terastation Live and can use it easily as a media server in both a Mac and Windows environment. No problems with file names.
However, I can not use the media server with an Airport Extreme Base Station. Other non-Apple routers work fine. Other people seem to have the same problem, which I suspect is related to the capability of the AEBS.
I'm having a discussion with Buffalo (good tech support). I've asked Apple Care and Geniuses, but they say that they do not support these types of questions.