Apple did something in a recent upgrade that seems to have broken Time Machine working through a drive connected to the Airport Extreme router. I'm annoyed. I bought a 1 TB drive just for this purpose, and suddenly it stopped working. It can't mount the backup.
Other people seem to have the problem as well, but it's not widely reproduced. I suppose I could just connect the drive directly, since I don't ever save anything long-term on the laptop, but that's sub-optimal because it's not what I originally wanted.
For more fun, my UPS failed on a brown-out, and one of the fans in my DVR is screaming. And my laptop randomly shut down twice. Technology doesn't like me today.