Sorry, I'm newbie here. I registered because I got into what seemingly are minor problems with the UI, I'm not sure anyone has reported them before. So, please just disregard the following if already attended to:
1.
*When in mini player mode - if stupidly/accidentally trying to start another instance of 'jaangle.exe' - then currently running instance makes itself visible to user in a window. Seems correct and pretty well done. My problem - it doesn't respond to shortcut commands at that moment - e.g. [num]+5 or other keys don't work-even after manually selecting window with mouse cursor and hitting F4. From this point, even returning to mini player mode and back does not return shortcut key control.
(**
edit--didn't notice before but seems even to apply on initial Jaangle start if in Window mode (not mini player)-quite possibly then second instance thing is irrelevant)
-->However, normal behaviour is restored if hitting the [Windows key]+[down arrow]
Haven't tested this with global hotkeys-I'm quite happy with the default shortcut keys.
Interestingly, using this combo-[Windows key] and [arrow down], does not give the same behaviour as hitting the leftmost minimize icon [_]to the left of the Jaangle window, or using the space bar+alt key and selecting minimize.
2.
One icon seems off-compared to the others which look much better. Kind of 'ragged' edges around it when selected. Here is a picture:

This is using the most up to date Jaangle on a Windows 7 x64 desktop.
In all, I'm pretty happy with it in spite of these minor details. Another minor detail with file names in Chinese characters..fine while playing after instant adding but on subsequent restarts of player it mysteriously loses their location and question marks appear in the playlist-have run into similar problems when using these with iShuffle but that's another story. Well, please confirm, if these are indeed bugs or not ;)
More edits...more time spent revealed nothing as to probable causes.
*PS, anyone using the full version of 'Unified Remote'' on Android/Windows PC and Jaangle? - here is something that could get you started... - granted general remote works also for Jaangle and could also be used instead