I have a 1 week old Ipod touch 2G running 2.1.1 firmware and have had this problem twice already. When I select a third party app. it takes me back to the homescreen. I have seen where iphone users have had this problem before, but it appears that there is no fix for this yet. Is that correct? Did I buy a lemon? The first time I fixed it by removing all 3rd party apps and re-installing them. The second time it happend away from home and I still have this problem until I get home today. I heard someone say that it may be solved by de-authorizing my computer then Autorizing it again? Any other thoughts.