I have the same exact problem, but I didn't update my computer or re-install the app -- it was already on my computer, and they must have pushed the update within the last 2 days. I thought it was weird that I had to re-sign in again, but I didn't notice anything strange until I wanted to close the app, no X. Another weird thing, the pop-ups that say the song title on the screen when pandora is not the active window are now PERSISTANT and don't go away unless I X out of them. Don't you guys test these updates (with real users on real machines) before pushing them out to everyone with no warning?? ... View more