Linux Mint 32 bit (with the Cinnamon desktop), but as I'm looking, I'm actually a couple versions back at 14:
http://www.linuxmint.com/edition.php?id=117
Linux Mint doesn't do rolling releases or simple upgrades, didn't realize that and slipped a couple behind.
I'm upgrading to 16 today, will let you know if that changes anything.
http://www.linuxmint.com/edition.php?id=143
(EDIT: During the upgrade to 16, relaunched Bitminter, which caused me to get an Iced Tea splash screen I'd never seen before, and now everything works as expected, Temp, animated gauge, all of it.
Tried to post this EDIT as a reply, but then it said I double posted it, now I can't find it... it might have ended up in the wrong thread, or it might appear here later. Weird.)