Using tools like pickaxes/shovels/axes while mounted on a horse or donkey is much slower than it should be. It's as if the speed is reduced to that of underwater-mining.
Environment
Mac OS X 10.6.8 Java SE Runtime Environment 1.6.0_51-b11-457-10M4509
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
Confirmed.
May be intended.