You may have to manually update the app the first time, it may not show up in your My Apps list. Also if the existing apk has been modified it may not let you update without uninstalling first. IIRC it has something to do with the app signatures not matching when an apk gets modified, like a video app that has been modified to work with root.
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Motorola Droid Bionic
Stock 4.1.2 Rooted
CM11 4.4 Safestrap