Mail screen not rotating to landscape
Since I updated to iOS 6 on my iPad, the mail screen does not rotate to landscape. The iPad will be in landscape but when I open the mail app, it changes to portrait immediately. When I exit the app, the iPad is still in landscape. The only other app I have noticed this problem with is Wikipedia. I have checked the rotation lock and it is definitely not on. What is wrong and how can it be fixed by someone not technically minded?
iPad, iOS 6.0.1