I found almost two hours of free time to work on UK MP today. And going through the bugs in the RC1 was smooth sailing this time. Album navigation works now as it's supposed to (you can navigate the other albums while playing one. Press next button and it will play next song in the album that you were listening to ... Yeah, that wasn't the case before).
I also installed latest firmware to my N800 and found out some crash bugs from that, which I Naturally, fixed. Next, I got info from dev of coherence project on how to setup the volume in the app and tuned the + and - buttons to work for the volume. Immediately I noticed that it's missing some sort of graphical hint on what level it's currently on. Well, won't happen for 1.0 release.
All right. Is that it? Pretty much. I feel that UKMP is very much ready for prime time. So, grab it and run it. You shouldn't stumble on many bugs anymore. Oh, make sure you have network open if you need album artwork to be downloaded. It'll cache them, so it's a one time thing.
If you don't have python installed, grab python 2.4 form here:
On a sadder note, I tried to install NuvoTheme on the device after flashing, but it wasn't installing. Oh well, some bug hunting to be done in the weekend.