Just a few hours ago it was reported that Apple had acknowledged to developers there was an issue with its App Stores that was causing corrupted updates to be pushed out to iOS and OS X users. It appears things are back to normal, with the company telling us that the problem has now been resolved. According to an Apple spokesperson, the issue originated from a server that generated code for Apple's FairPlay DRM system, and while it did affect "a small number" of users, it has since been rectified and the company doesn't expect it to occur again.
We were able to confirm that several afflicted apps are indeed downloading normally once again, so if you've been holding off on installing any new versions of your favorite apps, you can feel a little more confident hitting "update all." For those that did have their apps corrupted over the past few days, Apple recommends deleting the app in question and downloading a fresh copy.