Actually i can reproduce those issues with commits from 3 january, so it's not a regression (my first cps3 commit, the refresh rate change, was from 9 january). I think i mentioned some attract mode glitch (some vertical line appearing for 1 frame, mentioned somewhere on the libretro forum) on irc last year, i never noticed there were other ones.
There are lots of cps3 commits that i didn't backport from mame, what worries me though is the potential impact on performances.