The screen jumps around while trying to creating a topic. You have to keep scrolling down or type more to get back to your post pane. Bravo on not closing the damned thing when I accidentally click another link though.
When this happens the top bar gets stuck half way down the screen as well (I scroll past it).
I believe this has something to do with the repositioning code for when the keyboard is activated. It’s probably also related to the refresh forum function.