Lately I've been getting intermittent "Access denied" warning messages next to the "Check now" line. If I click on "Log in" the login window pops up, automatically logs itself in, and disappears, and everything updates. It seems like it happens about once a day -- is there some kind of 24-hour credential timeout?
It would be nice if the menu icon changed color to indicate that it had gotten an error, instead of me having to click on it to see the message.