Google Notifier sucks! Does anyone at Google actually use it? Every time it has trouble talking to Google, it pops up the password dialog. If Google is having an off day, this can happen a couple times a minute. Why not just wait and try again later?
With any other mail application, if I had this problem, I’d turn down the frequency it checks for new mail. But that isn’t even an option with Google Notifier.
You get what you pay for I guess.