Unfortunately, I didn’t think to grab a screen shot of the error — I was too busy watching a dead progress bar on my phone and praying to the Update Gods that I hadn’t just bricked it.
Fortunately, things restarted without incident after that.
If you choose to update to i OS 9.1, feel free to sound off with your experience.
As upgrades go, this one was fairly painless, but I’m hoping a solution crops up for the keyboard woes.
The entire process (including clearing space, restarting the upgrade, and upgrading i Tunes) took about two hours.