updated 09:21 pm EDT, Tue April 22, 2014
Quick update may have connection to earlier Airport OpenSSL patch
Among other updates issued on Tuesday, Apple has further updated the iOS versions of Pages, Numbers and Keynote -- formerly known collectively as iWork apps -- to version 2.2.1, just three weeks after its last update. The previous version introduced new features and restored old ones, but today's update lists only unnamed "stability and bug fixes," which might hint that the change is related somehow to an OpenSSL patch for 2013 Airport Extremes and Time Capsules issued earlier today.
The update's timing could also simply be coincidence, but it is possible that the apps have some vulnerability that was discovered in the wake of the Heartbleed bug and corrected. The last update, released on April 1, added "view only" settings to the sharing options, better compatibility with Microsoft Office formats, Retina display support and further improvements in the restore AppleScript support among other changes.
The latest update is free, and the programs themselves are free to new iOS device buyers or iOS 7 upgraders. For new buyers, the apps cost $10 each from the App Store.