Same here (am running the English version patched to 1.32). In BF Dungeon number one, all worked well, and I came up with two items needed for the five quests I had in the Battlefield area. The quests disappeared from my journal after I contacted the original quest-givers; howevever, when I sold the two items in question (a pair of green rag gloves and a special belt of some kind), the quests popped back up in my journal where they remain to this day.
I've justed received the key for BF Dungeon #2, headed back there for some much-needed experience, and the dungeon is empty. Not a soul. No experience to be had. Very disappointing. <img src="/ubbthreads/images/graemlins/disagree.gif" alt="" />