Wanted to add that I pulled all my funds out of mt. gox. I don't want to take the risk that mt. gox. could be one of the people who has been buying large amounts of bitcoins on other peoples money. That is why they have continued to keep throwing money into bitcoin as it has been dropping as a last chance to save themselves.
This is my fear too. There was no reason for mtgox to have 500k in an online, trade-capable account (during the first hack) unless they were trading their own market. There is definitely non-zero chance they could be long BTC and short dollars.