Tossing in some minor stuff I ran into in my playthrough. I did not read the previous posts to see if any of these were already posted since 42 pages is a little much to go through. Apologies if these have already been mentioned.

In the Radeka boss room there is a skull pile which seems to be unreachable. Since it's immovable you can't telekinesis or teleport it. The skull piles in this area were generally very fussy and annoying to click.
http://i.imgur.com/9vC65IL.jpg

After completing Stingtail's quest he was asleep in his area and I was able to talk with thim, but this would cause him to stand up for a split second and open an empty dialogue before going back to sleep. I believe our route for this quest was that we took the drudane to Griff and ended up killing him after refusing to turn in Stingtail.
http://i.imgur.com/rDnFCyR.jpg

For the rat npcs that want us to shock them to cure their lying/sarcasm, we first tried electrocuting pools of water (using a non-petpal character) to minimize the damage they took but this didn't seem to trigger their requirement even after several tries. It worked fine if we had our pet pal use discharge scrolls directly on the rats.

I managed to get myself stuck in this spot. I could walk in just fine but I couldn't walk back out. Trying to click the open ground just to the right would cause the 'Can't reach' error. It eventually let me out after I moved some of the items lying around on the ground even though they didn't seem to affect my path any.
http://i.imgur.com/kgUgaKi.jpg

After Ifan got his bonus turn from someone giving him time warp, his first aid skill would not go on cooldown after using it but it did cost AP. You can tell I used it twice in a row in the combat log and it's still available on my shortcut bar. I didn't try to reproduce it to see if it went for other skills as well.
http://i.imgur.com/Iup5UK2.jpg

Probably the most severe bug we encountered: During the final part of the act where you are back on the Lady Vengeance after blessing the gods, Gareth and Malady were acting as if in combat but without actually fighting anything. Mousing over them didn't give us a chat cursor and they would pace back and forth doing battlecries. We fixed this by having a character attack Gareth, and after they killed our character Gareth and Malady would appear by Alexandar. We could then talk to them normally to end the act.