I have been using MC16 for a while and have been building my library , now up to ~900 albums. I noticed that if I am in a view and change the order of that view, by track number for example, then select next track that it "freezes"' The hourglass comes on and it waits forever to move to the next track. The first track is still playing. Am I doing something wrong? Am I supposed to be doing something to the library like re-indexing? If I don't wait , close the window, then restart, it tells me that it didn't shut down correctly? Any hints on how to address this? It is on a VIsta PC.