I can nologer move music from a server to my phone via Subsonic App after taking the OTA... I tried both my local media server and the demo server that Subsonic provides for testing.
On the phone it looks like no data is being downloaded (it stalls at 0 bytes).
On my local server, I see a subsonic process with the command ffmpeg fire up and consume 100% of a thread. I think this is a transcoding library. Did anything change in NC4 that would effect media transcoding? Is it just as hard to revert OTAs as to root the phone?