Seriously. Don't trust the exchanges, don't trust online wallet services, don't trust your anti-virus software, and don't trust anybody online.=
Indeed.
INTERSANGO, the so called genuine 100% customer satisfaction etc exchange have recently blocked my account from sending bitcoins with an "incorrect address" message when sending, completely out of the blue to which I quized there customer services about this to which they acted all "I don't understand what's wrong" to which they shortly after LOCKED my account to which I had to chase them up to get "your account has been locked for breaching clause 5 (illegal use of bitcoins) further correspondence will be via support tickets".
Support tickets are supposed to be answered within 24 hours I have tickets outstanding for several days now. They refuse to answer my questions, including of course "how did I breach clause 5? please do tell".
If your ever thinking of using Intersango I would advise you to go elsewhere, the way in which they blatantly and egregiously scammed me of a fair deal of money is a disgrace.