Recited from memory by: Urlance Woolsbane
The author writes:
Phew! It's a good thing my business trip was cut short! Imagine another week of that! Thanks to everyone who followed my usual instructions, and didn't email me!
Those of you who read the other strips on this site have no doubt known what was going on from the get-go. For those who don't, allow me to explain: Due to a bug lurking in the site's code (I still haven't found the source of it) the buffer for, of all things, the existentially-themed A Zenmaster Walks Into a Bar was duplicated, replacing that of Postcard. The amusing but irritating result you know all too well.
Anyhow, I've reconstructed the buffer, replaced the rogue ZWIaB "strips" with their CoaP counterparts, and, in lieu of fixing the offending code, jury-rigged a solution to the bug. This won't happen again (hopefully)!
EDIT: Well, that's weird. It seems that each comic technically has two buffers, one for images and one for annotations. For all intents and purposes, of course, there's only one buffer to a comic, but still, I wonder how that happened.