YouTube does work without any issue on another account on the same machine. This led me to try deleting/restoring preferences, but as I said it was to no avail. I suspect I am going to have to create a new account, and migrate my stuff there. What is the best way to do this? I know how to create accounts - I am more concerned about pitfalls that I should be aware of. I would prefer the account name to be the same. I also have iPhoto set up so that the library is shared between multiple users on the machine. This uses ACLs. Ideally I would like this to continue working with the new account without setting it up again.