If MtGox is trading on its own exchange this is insider trading and should be stopped.
we should clarify this with the owner Mark kapeles.
MagicalTux has already stated that mtgox doesn't trade
at all because it would be unfair, or at least look that way. That may or may not be true, but I don't consider the whining of lousy traders or the insane speculation of conspiracy theory nuts to be evidence in either direction.
If someone does have actual evidence, I would love to see it, as would everyone else, I'm sure. That none has appeared seems to say a lot, even if it is neither conclusive nor final.