Registry Errors, when did you update? they may have fixed it already though I re-downloaded it and installed but no change. It seems to depend on what errors you get, some people like myself install and you get a variety of missing .ddl and iTunes wont even open, others install and then open the store at which point it crashes and then back to where I am, third people plug in the phone or pod and it wont recognize it, you restore the phone and then they both go down lol.