Minecraft Forums

1. hitting mobs while riding a horse is extremely difficult, particularly when moving, often what looks like a clean hit, will completely miss.

2. Once you put armour on a horse, it appears that there is now way to completely remove all armour, you can only switch armour.

3. Riding is also slightly jerky.

I know this is just in a snapshot, and I'm sure they'll be polished up by the update.

Don't worry about it. All these things will be fixed by 1.6. Just to be sure you could tell Mojang if you want but the obvious ones will definitely be fixed by 1.6.