Mystery solved. I mentioned last week finding ball bearings on the kitchen floor with no apparent source. It turns out the first place I checked was actually correct, as a caster on the rolling island in the kitchen eventually failed in an explosion of the remaining ball bearings, so there was a problem there that escaped my initial investigation. On closer look, it's no surprise this broke, as it was pretty shoddy, and the remaining wheels were already showing signs of the kind of metal fatigue that killed this one. Home Depot only carried threaded casters with ¼" bolts, but the ones I need to replace have 3/8" bolts, so I'll have to order them online, but at least it looks like it will be easy enough to find replacements to get things rolling again.

Ballsy Links:	Thanks Ant and Acleacius.
Play:	Shop Empire 3. Castaway Troops. Switch Bot.
Link:	Is 'SimCity' Homelessness a Bug or a Feature? Huh? Thanks nin.
Images:	Notch's Housewarming Soiree. Thanks HARDOCP. Here's one annoying thing about GTA. Image search of the day: "pets in lion manes."
Media:	WATCH: Kid gets new 3D-printed prosthetic StormTrooper arm. Dog takes the bus to the dog park by herself. Limbo Time!