I sent this by email already, but I'll post my findings here also. (mainly based on B1 though)

- If shuffle play is selected I would like to get also random first song. I.e., if I just press play it would be nice to start from a random song, not the first song always. Maybe remember what song played last?
- When I start the program, I get the "no song is playing" text, I may be wrong but before the screen did nothing, but it seems to work in beta 2 so that it plays something (or the first song in the library) when I touch the screen. Maybe a "play" button would make that function more apparent?
- The album cover list seemed to "flip" or reload some albumcovers when I left the list still for a few moments. I.e., the album art turned to black for a short moment and then displayed again. It was always the middle column and only some of the albums. I did not see the problem with B2yet so maybe you optimized it already.
- B1 did not let me skip track backwards, the "<" button did nothing. Another problem is that the remote in B2 does not let me skip back, but until the first played song. I only tested it briefly though, start playing, skip to next track, skip to next track, skip back, skip back (i.e., first song) skip back (no change). It should skip to somewhere (random) at least when random/shuffle is selected.

- B1 was not able toi skip track by pressing edges of the album art, B2 works - good.