In iOS 5, using the jQMobile 1.1.0 RC-1 candidate, I have an odd spacing issue with the way the footer appears on the page's first load. Below is a really basic HTML page that demonstrates it.
What happens is that, when I first load this page, and I click on the text field to enter text, the keyboard pops up, and the footer moves upwards to float above the keyboard (like it should), but it has a relatively large gap in between the two, probably 50-70px or so. If I hit Done on the keyboard, and then do it again, the gap goes away. This isn't a problem in Android, where it seems to stay stuck at the top of the keyboard.
Just wanted to post this in case it hasn't been seen before.