I have seen this sort of thing occur before – but not at moneybookers.com.
It has happened for some players at online gambling sites. I’ve been involved in resolving 3 cases in the last two years at different gambling sites … interestingly the players all HAD accessed their accounts in public terminals (proved by gaming logs and subsequently admitted by players) – and the fraud activity ALWAYS subsequently came from VIETNAM (also according to IP logs) within about 24 hours.
It may be a coincidence – but this scenario is a good possibility here too I believe. There is not enough evidence to say that the Moneybookers.com system is comprised from within based on this one event.
It is far more likely that you have used the moneybookers.com system on a comprimised system (with a virus or keylogger) – with your own system – or at some sort of public system (library or cafe?)