i have played through fathamurk, didn't encounter any bugs, on vista pro.
but here are my thoughts:
i felt that the dungeon itself was rather easy - the normal enemies therein were quite weak for my high level archer/rogue character, the slimes and spiders were easy to kill, and the puzzles werent hard.
however, the stone golem was extremely hard to beat. i might of been missing a trick here? i tried luring him to the lava, but he couldnt fit down the corridor, i surrounded him with numerous powder kegs, but he just kept healing himself up after.... i tried all element spells to see if he was weak to anything, to no avail, and even poison didnt seem to affect him.
in the end i had to powder keg him, then both my weapon feats using all buff magics i could muster, to get him down on health, then just hacked at him and hoped to kill him before i ran out of hp. my character is STRONG too, level 26. for balance, i'd suggest making his heal a little less powerful.
is the only way in to fathatmurk REALLY to just have enough HP to walk through that portcullis? REALLY?
also i was disappointed by the lack of decent loot i got. i came out with only about 1k gold more than i went in with, and if i didnt have repair, my awesome dragon leggings and boots would of all been knackered due to the lava, i kindof wanted a bit more a reward... i left almost everything i found in there, because most of it wasnt very valuable or i already had better.
i may have missed a room, but i don't think i did, even the treasure room with all the explosive traps had minimal decent loot
so now onto my questions:
what are the new "item bonuses" you mention?
where are the other new areas aside from fathamurk?