It happens to me too, extremely often (windows 7, java 1.7.0 from oracle). Problem persists at least until 1.7.10. It seems to happen after a while of riding though, might be triggered by sprinting while on a horse as it seems to make it happen faster. Unmounting, letting the horse rest, reloading the world, closing Minecraft, emptying RAM, or even restarting the computer or run scans don't change a thing.
It happens to me too, extremely often (windows 7, java 1.7.0 from oracle). Problem persists at least until 1.7.10. It seems to happen after a while of riding though, might be triggered by sprinting while on a horse as it seems to make it happen faster. Unmounting, letting the horse rest, reloading the world, closing Minecraft, emptying RAM, or even restarting the computer or run scans don't change a thing.