I've only had 2 major issues so far, the first is not world-shaking but worth mentioning; last night on my archer alt, Delbow, I bought a Long Espada Eslanova for 10k, and it instead added an Arabian Straight Sword to my inventory. Not a huge deal but a bummer not to get the item you want.
The second issue I've been having since the patch is much more significant, especially if it is happening to other people; I have been getting random FPS drops, where it will go from my usual 40-60FPS down to something that doesn't even resemble movement. Maybe a quarter of a frame per second. It effectively "freezes" my game and forces me to alt+tab out of the program and back in (a process that takes 5-10 seconds) to correct it.
The issue appears to happen exponentially more often each time I do this. So the first time it happens will be maybe 5-10 minutes into play, then the next will happen 3-5 minutes later, then 2 minutes, and eventually its happening within seconds of alt+tabbing back in.
I have never had this issue before the patch. I thought maybe to blame it on my GPU overheating but I tested the temperature while running the game and it keeps a stable 63 Celsius, normal for my box.
In case it matters, though, I am running DX9, Windows XP, and have an Nvidia GeForce 9800 GT (old card I know, but it shouldn't have this kind of issue with CRPG.)
Thanks for listening, and keep up the good work!