just bought the game couple days ago and without giving away spoilers im at the vanishing platforms in some cave, this issue i have with video stuttering is by the time i turn around after what most would call a cutscene that mother frickin platforms are gone ! I am not a reactive type gamer(arcade games are painful to play) and my system is fine, game runs great on a 5770, I got to the top platform via quicksave and keep trying. So after trying this on several settings even lowered graphic resolution. 20+ quickloads later I managed to jump onto the first disppearing platform only to have it vanish. I play many other games including a couple MMOs and never had a problem like this.. so quit with the dumbshit vanishing crap I dont want to play arcade games
If it wasnt for the crap reward I finally got or the game locking up my video card or the arcade style BS I would not have posted here. but I seriously think its an issue due to video stutter like the OP said. NO OTHER BETTER MADE GAMES HAVE THIS ISSUE!