Did Australia's Julia Gillard break royal protocol?

A minor row has broken out over how the Australian Prime Minister Julia Gillard greeted the Queen.

The prime minister, who was born in Wales, shook hands with the Queen as she landed for her 16th visit to the country but her failure to curtsey has caused a stir in the Australian press, with some saying she was disrespectful to the monarch.

The prime minister has defended her greeting, saying it was entirely within protocol.