When your money disappears for over a month with no explanation, that is not the fault of the network, that is definitely MtGox's fault
You gave them an invalid address twice. If you asked them to send cash in the mail, and gave them the wrong address, would it be their fault if/when the money disappeared? If it took two weeks for the post office to return the undeliverable mail to sender, and Mt Gox could re-send your money, would that be their fault?