On OSX Lion, iTunes keeps prompting me to enter my username and password to "sign in to enable this computer for automatic downloads." In the past I tried checking the box to remember my password but it kept forgetting, so now I just disabled the "always check for available downloads" option in Prefs -> Store. It still prompts me. It drives me crazy.
Is there a way to get it to stop prompting for my password, so it will just behave like a well-behaved offline music library manager, and only ask me for my username and password when I open the iTunes store?