The title pretty much says it all.
Nearly all my media on the DNS server doesn't report a play-length on the PS3. If I move the file to my PC and run the server off the PC, I see the lengths. For the DNS-320 it just shows a dash, "-".
Although, once for a 2 hour movie, it displayed a completely absurd 19 hours and some minutes.
Why is it not reporting the times or reporting them incorrectly?