Most of the bugs I encountered on PS3 have already been mentioned, although I haven't seen this - a very loud digital sounding "bloop" will occur every so often, mostly during loading screens but sometimes while running around. Very jarring and possibly damaging to speakers.
Sometimes when I pull up my Journal, when going back to the game, it will give a bunch of notifications in the upper right that I've completed quests that have long been finished. It will cycle through a bunch making that "dun dun" noise each time. I usually just have to let it run its course.
SPOILERS FOR FINAL MISSION
While fighting the false arch demon, he glitched up inside of a wall and somehow my companions were able to pass through it partially, yet I couldn't. I was only able to continue the fight by switching to a character that had made it through the wall then the inquisitor also passed through. The dragon was pretty much on top of us while we attacked it.