Sure it is, that's why the couple hours I played coop with the friend I bought it for had 2 CTDs, 5 memory leaks (I'm assuming that's what the cinematic fps drop and hold is) and 2 totally unknown graphics glitches, causing me to have to completely exit game and restart every single time.
Got to the point where I just say 'fps again' and he'd guide us to a save spot.
http://forums.obsidian.net/index.php?showtopic=58873