Google ran a Doodle4Google competition in Australia and Jessie won with this Doodle:
When they posted the Doodle on the Google.com.au web site, it was missing the Aboriginal Flag. Here is a picture:
Thanks for voicing your concern here in the forum. Just to make sure everyone is aware of what took place I wanted to explain here that due to the Aboriginal Flag having copyright, we requested permission from the Aboriginal Copyright owners to display the original doodle with the flag on the Google homepage. They declined the permission and as such, in consultation with Jessie, we had to gently alter the doodle so we could proudly display her wonderful artwork - of which we are very proud.
It is a shame Google was unable to get rights to show the flag there. But Jessie seemed like a good sport!
Forum discussion at Google Web Search Help.