I have this issue in 14w02b without any mods. However for me the text takes three lines taking up space between inventory and enchantement selection, instead of going to the right.
I think this is caused by unsynced width of anvil block in singleplayer and server files. Thus, playing in SP is ok, but server thinks that anvil is wider than client knows, pushing player back when updating his position. So the fix would probably be changing anvil's hitbox in server files.
I don't know how I made that mistake in the title.
I meant that as only one lead is consumed when you bind an animal, you should also be capable of using lead when you have only one left. And this may haven't been noticed earlier because of that crafting recipe.
Reproduced this. No need to put the armor on, just the saddle is enough. Also, the horse isn't tamed. When I took the saddle off horse threw me away and behaved as an untamed one.
Edit: also lead can't be used on untamed saddled horse, unlike on the tamed ones.
Please help me guys