I'd like to help more, though I've had too much to drink...
I had a quest that was missing 1 item, merely removed the quest, it went back and tried again and succeeded.. Most likely interference from another player.
Currently running smoothly, however, the first issue was not actually my first issue... I got stuck often on my frost mage as well...
I am unable to post any logs, I'm actually fairly well rounded when it comes to C and Java, however, I refuse to pay for something that still needs support, so I'd prefer to pretend that the error is my own.