I moved some money to mtgox recently and I had no problems at all. But, as you now see, it wasn't a problem with MtGox rather with your bank. Try again with the "other transfer" code then..
I called my bank and they say the transfer has been cancelled due to 'EU sanction rules'!
The girl at I spoke to at the bank thought it could be because I used code 793, 'Other capital transactions', to identify the type of payment. The last time I deposited money at mtgox Zachodni bank account was april 2 this year. Then I deposited a similar amount of money as this time and used 560 'Other transfers'.
So either the word 'capital' was considered offensive by the EU regulators or they have tightened their policy...