I see that 2 brazilians have already attended to this post as they're all having the same problem. I too can't see my updates when I start mintUpdate. I've just migrated to the Gloria gnome version just the day before yesterday, and everytime I run my mintupdate (as said above, it is automatically started on logon, and displayed on my system tray, seemingly working properly), it freezes in gray for as long as I don't force it to close.
I know there's a simple way to get updates from the Synaptic Manager, but there I have no access to prioritary updates rather than downloading a whole bunch of packages that might turn out to be useless (if not dangerous) to my system... So updating via Synaptic won't work for me
Is there any other way to fix it? I've tried reinstalling mintUpdate on my Synaptic Manager, but then when I opened it... all turned gray again!
Question: Could this issue be somehow related to the brazilian language, portuguese? Roberto, Fernando and I are all brazilians.