Just an FYI:
I actually downloaded the most recent update v1.2.4103 before I saw Steven's link above in this thread, but didn't test for this feature (didn't know it was fixed @ the time). So then I used the link in this thread, and although the feature I wanted worked, it seemed (maybe by some fluke) that the artist display information (in a tab in my case) was giving me a blank screen. To test, I then went back to v 1.2.4103 and found that the artist information displayed as normal AND my drag-to-playlist feature worked as well. So I can only conclude that v 1.2.4103 is the best one to be using now (looks like my request made it in time for today's build). But again, could all have been a fluke or some random error, so may not be worth worrying about.