I didn't purchase fares (have an amazing one world RTW coming up separately!), but will watch the way this plays out with interest. It's important to note that Qantas was made aware of these fares prior to 9 am this morning (check out the posts to their Facebook page), yet people were still able to book them well up until midday, no doubt resulting in hundreds of extra bookings of the erroneous fares. No doubt it will be a challenge for Qantas to follow these all up.
I also note that on Facebook, when the fares were queried, Qantas simply kept trotting out the line "we are unable to comment on third party website airfares, please follow up directly with <third party website>. Thankfully Red Roo has now come back to clarify that position, but he/she has come to the party a bit late!