One of Apple’s selling points with its iOS and Mac App Stores is that it can provide a safe, trusted location for users to update their apps knowing any changes have been vetted by Apple — though in the last few days it appears some issues have been disrupting the system. Instapaper developer Marco Arment writes that when the 4.2.3 update to his popular reading app rolled out yesterday, users found that it was crashing immediately upon launch, even though the archive Arment submitted to Apple worked without issue. Several hours later, the problem was mysteriously resolved without explanation from Cupertino, but not before Arment had been contacted by users of other iOS and even Mac apps that had been experiencing similar issues over the past few days. Read the full story at The Verge.