I just upgraded my home router (RB133) from v5b6 to RC1 and now I get a kernel panic and reboots every 60 seconds or less.
I was not entirely sure where to list this bug, but I saw in the change log a kernel upgrade.
Either take a supout.rif or generate the automatic generation of them, and email support@mikrotik.com. A kerknel oops isn’t anything the community forum can help with, it should go straight to the developers.