Re: mtgox.com has blocked my account with 45 000 USD in it!

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7. I meet man in IRC who offer me to make deal, he send me ~9000$ BTC I send him ~3000$ liberty reserve (simple trade) minus some fees, I accepted, trade was made. btc rate in that day was ~0.30/BTC.
8. After month after trade was made (with man from IRC) I noticed that my mtgox.com acount is blocked.
9. Mtgox.com starting asking from where I get those 9000$ BTC, I explained.

After the deal with the stranger, have you done any BTC deposits to your mtgox account?

No.

How exactly did mtgox refer to the 9000$ BTC in question, in their inquiry?

He blocked my mtgox.com account, and started asking from where i received 9000$ , I explained him.

Did you specifically generate a new address for that transaction (deal with the stranger), and have you ever used that same address to receive bitcoins before or afterwards?

I was "playing" with bitcoin client , I created some addreses (curently I don't realy understand why there is function to create new addreses ). I was using one bitcoin address with mtgox.com and second for trade (with that man from IRC), to trace money income into my bitcoin client. I never used those addreses for any other activiti. I also have some more addreses in my bitcoin client, but they not in use.

Is it possible that you used (accidentally or otherwise) the same address you used with the stranger for any other transaction (e.g. mtgox withdrawals), before or afterwards?