First of all this looks extremely promising! I have had lots of release software that has been less changed since the previous version and has a lot more bugs than this!
Cudos, guys! So to the bad stuff: When going back and forth between normal view and mini view the mini view will end up around 1/4 below the upper edge of the monitor, even if I had it all the way up before I changed view.
Also, and this may have been reported before, I haven't read all the messages, Playing now should be at the top in my opinion, not at the bottom 1/3, as it is now, at least on my system.
And the slim skin, which I like a lot, should perhaps be a bit slimmer. Smaller buttons, only one line of text with smaller font would be great.
Finally I can't find an option to have the mini view on top of other windows, which I would like very much.