The "hot potato" bug is fixed. Look for a calibre update notice in the next couple hours (or whenever the plugin site updates).
For anyone interested, I've started taking BitCoin donations, send to my wallet at 1JwHa28vQ33FzCofRMNgpzfUcNGpoh3hUR. From other donations, I'm about 65% of the way to the cost of the Aura HD, or about 73% of the way to the cost of the new Aura (which I assume will basically be the same as the Aura HD, but smaller).
And here's me hoping that Kobo has made some glassmaking breakthrough and the Aura's "edge to edge" glass screen doesn't have the same glare as every other device with glass screens



(or, you know, more ideally that it's not actually glass...)