Hi Ronnie,
Correct - 44.1 FLAC was no issue.

I wondered if it was something that the server software was doing e.g. Choking the data flow.
Or
Was it the client receiving side when UPNP
Or just a buffer issue with the higher rate via UPNP

It is odd that it doesn't have any issue via SMB so it can't be a simple bandwidth issue.

Correct also that the SBTouch played them fine even via wi-fi.

DVD .iso also plays fine.

Yet to try Bluray .iso

Cheers


Rgds,
Nick