It was just a 5 minute schedule change which in the past has not required re-ticketing which is why I was confused why I received a new confirmation email.If you've paid the taxes, they'll probably send it to you in the middle of the night. So you should get the actual eticket by the time you wake up.
Can also go into MH site and it will show you the eticket number for all legs that have an eticket right now.
The OWA has already commenced so there's been no changes to the flights or taxes.
Thanks for the info about the MH MMB - the site lists 2 e-ticket numbers but doesn't specify which one is for which leg(s). I assume the old e-ticket number is for the flights already flown and the other number (which appears to be the new e-ticket number as it's not a number that has been in my previous confirmations) is the updated number.
Maybe that's the limitation in QF's systems as the email I received was titled 'Confirmation and e-ticket flight itinerary for xx'.
