The UI is slightly too high on an iOS7 device, causing some elements in the status bar, dialogs, panels to be cut off vertically (see first screen shot).

If this happens, you can actually scroll the screen up, which then gets stuck in that position (see second screen shot). All elements then show up fully, but the header is then cut off. You have to tap on the status bar to get the browser to jump to the top of the page again to get back to the first situation mentioned above.

I've also noticed this problem when working with Favorites and dialogs (see additional screen shots). With dialogs, an additional gray line appears (see here).

Since the height available to a web page in Safari on iOS7 as changed, I assume that this is the root cause for the problem.

As all controls can still be used properly, I haven't marked this with a very high priority, but since it's visually apparent, it's still marked high.