Joining Qantas, Korean Air is banning both Apple and Dell laptops on all its flights. The ban affects all Dells, but only iBooks and Powerbooks, not MacBooks and MacBook Pros. The good news is, if passengers take out the battery and place them into checked luggage, Korean Air says everything's hunky dory.
The other Korean carrier, Asiana Airlines, says both laptop brands are still alright on their flights. So keep an eye out if you're flying Korean Air sometime in the next few weeks.