The times i've had driving out there i've found it to be, erm, random at best. The Maltese seem to enter a roundabout more to force their way through rather then impose any right of way, to prevent crashes it seems to be a matter of 'if you hold the ground, then take it and get out of the way of others!'
With driving out there, just 'go with the flow,' obey the road signs but be aware that it is a fair bit more relaxed out there then here. At least they drive on the right side of the road though!