but the question is why to go for the portrait mode when it's not proper . like the phone is all landscape then why to force it for the portrait ? well i had the same issue a month back and what i have decided is to settle my self down with what i originally have :P so my orientation lock is enable and that forced rotation is unchecked and i am happy to use it they way it is letting me to :P
/usr/sbin/share/themes/alpha
/usr/sbin/share/themes/beta