I wouln't worry too much - the Intersango people seem to be the most open bunch there are involved in Bitcoin. I did notice a message on their page a day or so ago about being behind with withdrawals, so maybe they are having some technical problems. But as I said, I have faith in them personally.
(as a side note - my bank blocked access to my bank account after I sent my last payment as they believed it represented 'suspicious' activity, until I could prove I was the real owner of the bank account - not sure why they thought that as I've sent money before with no problems)