Version 0 withdraw appears to be working fine for me. I just tested it and I was able to withdraw with the API.
Are the other methods working? It might be that you don't have withdraw enabled on your API settings page.
You're right, after I enabled withdrawal in settings page, it works now.
Thanks very much!!
BTW, dose the version 1 API support withdrawal? I didn't say any deposit or withdrawal API in wiki page:
https://en.bitcoin.it/wiki/MtGox/API/HTTP/v1Thanks!