I have read on another website this morning that the 'in town' Duty Free shop behind the Emilio Hotel has now closed. Apparently there is a new one in the Awamaya (sp?) area due to open. I understand that this is somewhere near Pizza Hut!
The Karnak DF shop apparently closes at 5pm. Sorry, I don't know the opening time.
Please note: This information is not from any official website. I post it here as general information but cannot be responsible for any inaccuracies.
If anyone has any further information it would be good to hear more.