On 3/21, I transferred Bitcoins to my account and traded them for LTC. It required multiple trades and I had 443 LTC in my account within 45 minutes. I literally sat by my computer until the last trade, then tried to transfer the LTC back to my wallet as soon as it showed up. That's how I've conducted every transaction with any exchange. I received the "pop-up" error when I tried to transfer back. I alerted Vircurex to the problem and soon after, a post when up that they were aware of the problem and working on it. I retried the transfer hundreds of times over the next few days using different computers, OS, and browsers - same error.
Similar, although back on the 19th, trading DOGE to BTC. Got wallet errors, but thought I'd got all my BTC out, except one set never arrived. Still waiting on any indication of what's going on (are they working on crediting broken withdrawals, or are they simply auditing the whole lot before freezing it, or has Kumala had a nervous breakdown and everything's on autopilot?)