Thanks for your quick reply!
truthling@Truthling:~$ lsb_release -a
No LSB modules are available.
Distributor ID: UberStudent
Description: UberStudent 4.1 Epicurus
However, after restarting my laptop this morning I got a notice for an update for the update manager itself. After running that update I then had a long list of updates, including many xfce related things, one of which had a note about Uberstudent 4.3, so I think it might actually be upgrading right now. I also see that its getting packages from URI http://uberstudent.net/heraclitus*
, so that is promising. I'll run
again after the update manager finishes what it's doing and see what it says.