Safety
Apple iOS 5 Update Problematic for iPad EFB Users
Apple’s new iOS 5 operating system is causing problems for iPad aviation app users, including deletion of data without warning

Apple’s new iOS 5 operating system is causing problems for iPad aviation app users, including deletion of data without warning and other glitches. In some cases, this can lead to deletion of files needed to display aeronautical charts on popular iPad apps such as ForeFlight and WingX.

The problem, according to a blog post from ForeFlight, is that apps that use large amounts of data store some of it in a cache directory, which iOS 5 can empty when it needs the space, instead of the documents directory, which doesn’t allow data to be deleted. ForeFlight checks for data when it is started and warns the user if missing data needs to be redownloaded.

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