This one can be really tough.

I just had an issue with a WiFi reception so the Touch could not successfully upgrade the firmware. Because it's wall mounted I tried to switch it to a different network that's closer by but was unable to enter the network credentials because during the process, about 1s into entering the password the firmware nag screen engaged and there is no way back to continue entering the password. You have to start over which leads to the same results.

I see the same when switching between servers with authentication and different firmware revisions.

Solution: the nag screen should not engage while you are entering something, that is, while the keyboard is visible.

Radio is the same, btw.