I have a simmilar problem. When I pair my PS3 Slim with my N900 via Bluemaemo everything works fine the first time. But every following attempt fails. Well actually it doesn't really fail. The pairing works and the blue dot in the ps3 device manager even lights up, but apart from that no command seems to be registered by my ps3. The funny thing is that when I remove the n900 from the ps3s device manager and pair the two devices from scratch everything works flawlessly until I close bluemaemo.