Honestly, the issue is they do not have the cash and these capital controls are meant to prevent a "run on the bank" which would sink Mt. Gox. They are using customer deposits to pay ongoing legal, regulatory and operational expenses. Considering they missing over 5M being held by the US Government and need to keep a substanial reserve for possible legal settlements, things will not get better anytime soon. It is not conforting they are lying about the real reason (it probably criminal), but I see why they are doing it. They are hoping to "earn" themselves out of this hole and hoping for a settlement in the near term with the US Gov for the frozen customer funds as well as Coinlabs for the Mt. Gox customer funds they are withholding and legal settlements.
Mt. Gox USD is trading at a substanial discount to real USD, hence the "inflated" value of BTC on the exchange as it is the only way to get funds out of Mt. Gox. This is going to end badly and it is dangerous to try to time this. Once Mt. Gox goes bust, there will be lots of missing customer funds, and after a long legal and complicated liquidation process, depositers will get back pennies on the dollar.
That's possible too, and I'm kidding myself. yes I have a personal interest in that this ends well. If Gox turns out to be only deceit build by thieves, not only customers will get burnt. This will be a fail of Bitcoin as anything more than drug money! Bitcoin itself will survive unharmed. But the concept of a voluntary decentralized currency as a builder of trust professionally will get hurt on a level visible in the exchange rate!!!
Posting a web article telling one side of the story is easy! Compared to Bitcoinica and Intersango, and even the former famous pyramid schemes around here, the article does not contain any accusations or mud slinging nor any attempt to flea responsibility. If there was a top 10 credibility list on statements from troubled Bitcoin businessess, Gox would be on top for actually being able to issue a "statement", or what we should call this article, without compromising them self further. True or not, this is so far the most convincing proof of intelligence within a Bitcoin business to date.