Yeah some people have mentioned that WMP deletes music randomly so watch out for that one. I have been playing tracks for hours now and it hasn't done it.
I also lol'ed at the track timer. Something's pretty wrong there.
I preferred the black WMP I wish I could change it back.
It has a cool feature where it randomises desktop wallpapers.
There is a fix for that WMP bug now, not sure if it is on Windows Update yet though. All it did was cut about 2 seconds off the start of a track if the metadata header thing was over 16k, which is most common with tracks that have their album artwork in the header. But it isn't a problem anymore.
I have found another bug though, I created an auto playlist for songs I rated 4+ stars and then put it on shuffle. Then went through my library and rated some more songs and it added them to the playlist but when I play them it plays the other songs in the playlist. I had to restart WMP to get it work.
Also, to do with the superbar. When you pin an application to it and then uninstall the program you can't remove the icon. It gives you the option to but it doesn't actually do anything.