Updated to iOS 6.1.2
While I was updating Java on my laptop, I noticed that Apple posted an update to iOS - 6.1.2, and so I had to download that before I left for the train. The release notes that I read on the web this morning say it's for an Exchange bug that would cause excessive network traffic, and therefore battery drain, but I didn't notice the problem in 6.1.1 - but I'm not sure that I'm using Exchange connectivity any more. I think GMail switched over to IMAP for iOS 6.
In any case, it's nice to keep things up to date, and this was just another little thing to do to get a progress bar moving across a screen.