I'm using the implicit OAuth flow for our native iPad app. We're calling the standard URLs in a UIWebView. The Stack Exchange login renders with several UI glitches.
The first screen looks correct:

However, when you click on the Stack Exchange login the following is rendered:

I've confirmed just opening the dialog URL on mobile Safari for iPad it also renders this way.
[UIWebView scalesPageToFit]it does still wrap. In case anyone else runs in to that. – bromanko Mar 1 '12 at 17:59