I'd smelled a faint electric burning scent in my control/computer room yesterday. I tried my best to locate the source, but had no luck. I tried turning off various devices in turn to see if the aroma might dissipate, but the scent persisted. This morning, it was even stronger. I tried checking in my computer, thinking the fan may have burned out... no dice... got on my hands and knees one last time to give my nose one more chance and tracked the smell to the general vicinity of my UPS, which didn't seem to be hot, then my hand grazed the power supply of a cd-r drive that I haven't used in four years (it hasn't worked in that long, but had remained plugged in... welcome to my life) and I became suspicious. I flipped it over and found my culprit:

plastic melting, probably a few hours away from burning down my house.
another bullet dodged.