I'm looking at a similar problem, but can't even get the PS3 to see my NV+ anymore.
It all used to be OK till i switched to the 4.1.6 Radiator. After that, I had a connection occasionally, now the NV+ just fails always to show up on my PS3.
I have tried the interval-solution (set to 25), tried to reinstall the readydlna, unswitch the uPnP, nothing helps.
If i'm switching on my other computers on the network (all vista and win7), then I immediatly see them appearing on the PS3. Is there someone who can have a look? Must i install the debug version of the dlna? how can i provide you guys more info (logs). Where can I find more info?
PS. when installing, rebooting, etc... the log file (status in frontview) always states that whatever action i did was succesfull.
I like the ReadyNAS NV+ very much and it's an excellent machine, and I loved it when i still could use it as a media server for my PS3 (it used to work flawlessly), but now i'm getting pretty desperate....
Help would be much appreciated !
Thanks in advance.