I suffered the weird bug of all apps suddenly jamming in landscape mode also.
was fine for weeks, then pop all apps are landscape. wipe the rotation setting in Amon_ra and its fine again, day or two later and it jams back again.
did a full wipe fresh format card (as with all flashes) so ie no idea why this happens... tried out a few other roms they are all fine, went back to R1 now and thats fine also.
That is definitely related to the problem I had. Originally I remember a program jamming when I installed this latest ROM version. Funny thing is, fully wiping everything didn't seem to help it very much. I still have issues with the latest sensor files.