Also have no printer control icon in task bar in Cinnamon, LM12, Main Edition. The suggestion to browse to http://localhost:631/printers/
is appreciated. It is simple and works well. I only discovered this when I had to cancel a 14-page print job and could find no way to do it from any menu.
I'm probably missing something obvious as usual, but I never had this problem since Mint 8. Anywho, I'm sure if this is a bug, it will be fixed as Cinnamon is worth any effort!