My crossed fingers have failed me.
It turns out that yesterday, about 16 hours after resetting, reflashing, and manually setting-up my router, I had to reboot it to get it to print.
So, I am giving up on printing with shareport with 1.32NA. If a new firmware comes out, I'll give it a try. Or maybe I need to spend money on a more robust solution - a printerserver or a network-aware printer.
Grumble.