What that means, basically, is Craig's erratic behaviour is medically explainable - he's not just the attention-seeking twit some of us (i.e. me) had him pegged for.
The singer's condition was revealed at a court case in Sydney where he was facing charges of assault and malicious damage. The charges were dismissed, but not before his condition was made public.
Asperger Syndrome has only recently been recognised by professionals. Sufferers are known to have difficulty adapting to changes in their environment, and may be more sensative than your average person when it comes to senses.