Sorry for the belated reply but some impossible bugs (sticky floor, continuous crashes) in the previous release really got me out of the game for a while as it was a total pain.
I really appreciate the new improved brightness switch of 0.5, which does not anymore produce ugly colors (same monitor yet). However I think it's bugged because now and then it just doesn't work, specially in "those dark places", where brightness control doesn't seem to work at all (feature?), but sometimes also suddenly drops wherever else and, then, either you can revert it by increasing brightness more or you just can't tweak the brightness at all and all looks pretty dark even at noon (again nothing of this happens with any other program, only PS). Should I report this as a bug?
Anyhow it'd be nice if we could save brightness settings for the game in general, so it's not needed to tweak brightness every single time you get in.