Great work on this project guys. Overall it seems to work well.

Using Feb 1 2012 version from extras-devel:

The playlist view seems to not always register a long press (to bring up the context sensitive menu). In particular it seems to happen after removing a different song from the playlist. Sometimes when you try to long-press on a subsequent song, the menu never comes up, and so when you release your press, it acts like it was a short press and starts playing that song.

The "append opened songs" setting doesn't seem to work. I expect it to append the song to the playlist, but replaces the playlist with the selected song. Maybe I misunderstood what this setting does.

Can we have settings to remove the "delete" and "set as ringtone" options from the context-menus. I really don't see those as very useful and most of the time, I don't even want those options there in case I (or someone else) was to accidentally click them.

There is a slight difference in the UPnP browser in that on the stock player, if there are more UPnP servers than can fit in the window, it shows an icon you can click to get a full-screen scrolling list. It is a little easier to use than the horizontal scrolling in OMP.

In videos, if you select "categories" display, it is possible to click on the category titles and it looks like it tries to play them as if they were videos (enters video player and screen goes black).
It would be great to be able to set categories in the videos section. This is missing from stock as well.