windows media player 10 tech beta

I installed the WMP10 Tech Beta on my workstation here at work. At first I was mildy annoyed by some UI bugs, but it is a beta and I have faith they will hammer those out. What really made my day though was a new play list feature. I had added a carefully chosen subset of my music collection and was reading some site-o-links. I clicked a link and it turned out to be a video. The video promptly played in WMP, destroying my play list as has happened so many times in the past. But, lo! There was a little line of text saying I could click 'previous' to return to the play list that had just been destroyed. This made me indescribably happy.