When eating any food (porkchop, watermelon, zombie flesh, etc.) after you eat it, if you start sprinting or keep sprinting you will keep eating until food is no longer available in your hand or you stop sprinting/walking.
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Is this still a concern in the current Minecraft version 1.7.2 / Launcher version 1.3.4 or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.