I just switched my Ubuntu laptop to Mint just yesterday... I tried Mint for the first time.. yesterday and it really impressed me. You've guys done such an amazing job.
Here comes my feedback after a few hours of use.
When I start my computer and log into the session, it takes a few seconds before the connection is up. I'm using wireless with WPA security and DHCP.. so it's not instant.
Apparently mintUpdate checks for updates immediately and reports it can't connect to update servers as soon as you are logged in.
Due to the delay the wireless connection is established, people would get a "broken" lock icon for the 1st 5 minutes, which can be disturbing for some people (I changed the check to 60 minutes, which means a broken lock icon for an hour).
mintUpdate should work along with networkmanager to make sure a connection is up before attempting to check updates.
Some other feedback to come from me soon, especially regarding i18n
Thanks a lot for the great work