The PDA portal seems to be opening links from the gateway in new windows, rather than inline.
1. open Sakai trunk on a mobile device and you'll be automatically redirected to the PDA portal.
2. Bookmark this page and add it to the Home Screen (iOS).
3. Launch the 'app' and you'll get a window with no address bar or buttons, as expected
4. Click a link in the gateway, it will open in a new window rather than inline.
This might be a regression caused by some of the other work around the PDA portal.