Sometimes the update now button doesn't really update either. Changing the weather source will sort of fix it until it happens again. Not sure if it's important, but I usually don't shut down my laptop but hibernate it. With past versions the widget did not update for a long time after resuming from hibernation, not sure if it updates soon after resuming with the latest version though. I'm using the latest hotfix. Sometimes the updating dot does not go away after updating.