I have PS3 connecting via DNLA to media server PC running full version of Windows 7 on ethernet cable.
I get anywhere from every 15 mins to every 30 seconds continual message - disconnected from media server. It even log's out of PSN and back in again.
Driving me crazy.
Same issue here, switching to my wireless connection or disabling the media server option are the only things that stop the error. I'm guessing a firmware update started this crap. Hopefully this will be fixed soon.