Yes (he says very cautiously).
I've still no idea where this error message is being derived from. It isn't a part of the AustPost distribution files. It *may* be the result of the generic error message having been redefined in /languages/modules/shipping/austpost.php, but even that shouldn't cause a looping problem, after all, it's just plain text. However, just in case there is a connection perhaps if you temporarily restore this file with the original and see if the problem persists it may give further clues.
Cheers
Rod




