maybe everything worked in older version:) i'm translator, 90% of software in my PC is compiled from GIT/SVN
everything was ok, and today not everything is ok:) personally i don't care about this, but such bug/error/incompatibility exists.
EDIT: i'm thinking here... in my case it's possible that after install smplayer restored default settings. without checked "allow hard frame drop" setting, my smplayer from time to time loses audio and video sync.(my pc it's older then time itself)