Hi. With current latest beta 1.1.17 there is the issue was detected. Detection was when you connect to UpNp server (here it was foo_upnp plugin on PC). When server start and mobile version connect to it and then you choose OGG (Vorbis) type files to play - it starts playing it, but you can't use fast forward or rewind i.e. no seek bar possible. I have a lot of Vorbis files and this bug doesn't allow to enjoy music at full power.
Cheers.