Is it possible to force the leaderboard to appear in a specific orientation?
Andos - the best remedy I can think of is to provide an option to open the leaderboard in the Game Center app itself. A lot of games I play do this - you touch the leaderboard button and it loads up the Game Center app already at the current leaderboard (at least it appears this way, as the leaderboards are full-screen rather than an overlay.

