So I just spent the last 25 hours reading Mistborn and Well of Ascencion (I found the first book so gripping I read it in a single sitting and then went to the store to get the next book and ended up reading that straight through too). For the most part I was very pleased and impressed by the books (though to be honest I liked the first book more than the second). However, I did notice a mistake in the Well of Ascension that I found a little jarring. I looked through the forum here, but didn't see any previous topics on this point.
Some minor spoilers are contained below. If you haven't read 'Well' yet, stop right here....
On page 216 (the hardback edition, obviously), or in other words the first page of chapter 24, the text reads as follows:
"She had asked Clubs to burn bronze, and he had claimed to hear nothing from the north. Either he was the kandra, lying to her about his ability to burn bronze, or Vin could hear a rhythm that nobody else could."
Yet this contradicts the rest of the book and the first book, wherein Clubs is a 'Smoker' Misting -- i.e. he can only burn copper, not bronze. If Vin was going to ask someone to burn bronze and check if they heard pulses from the Well then she would have had to ask a Seeker or a Mistborn. This wouldn't really have bothered me, but for the fact that two fairly important plot threads appeared to be heavily involved in this paragraph -- the "Who is the kandra spy?" thread and the "Am I the Hero of Ages?" thread. It was here that Vin determined that either Clubs was the kandra or that she was like Alendi (in being uniquely able to hear the Well).
So that was a little upsetting. I wonder if that is something that can be fixed for the paperback edition (assuming the publishers do that sort of thing)?