Not sure if this has been documented elsewhere, and this also may be down to human error but...
I'm noticing odd behaviour when attempting to sign in to the Appstore on an iPad running latest iOS. Essentially, when the alert pops up to enter password, I cannot switch to the numbers keyboard. Also, the ok and cancel buttons become inoperable. Finally, I am unable to use home to get out of the alert, and must power-cycle the unit to get normal functionality back. the undo, paste (etc.) buttons located above the keyboard do still work.
Has anyone else seen this? I can reproduce in various parts of the OS namely:
1. in settings | iTunes and Appstore;
2. in various apps where one may restore previous in-app purchases.
Interested in others' feedback before reporting to Apple; for all the good that will do anyway.