Core Infinity listening impressions and comparisons

[AlexS]

I tried UPnP yesterday with rather disappointing results:
1) As a renderer, Devialet does not support gapless playback - crucial with classical, where continuous music may be split into separate tracks.
2) I was also not able to fast forward a track - it'd just stop playing.
I used JRiver as a media server and control point (the latter via JRemote).
Has anyone else observed similar behavior with other servers and control points? I wonder if there is some incompatibility between JRiver and Devialet UPnP, or it's simply flawed.