I recently updated several apps on my iPad. Some of them were free games, but I also updated Facebook, Weather.com, etc. when I log out of Facebook, the splash screen always shows in portrait, while I almost always use my iPad in landscape mode. Some of the games display in portrait after I close the ad.
I have not updated to the latest iOS, as I don't want to lose the old Maps app.
Is this really misbehavior by the apps, or is it because some programming interface has changed, and I haven't installed the latest operating system, or something else?