[Enchanted] Broken?

So i'm having an issue with my enchanted pickaxes... I normally would be able to instant break sand with a eff 4 pick but it isn't working anymore? So i tried an eff 5 pick... same thing? Both are diamond pickaxes with Unbreak 3 and eff 4 or 5...

-Az

Someone on Smp2 was saying this last night.....

You have to use the right tool for the job. Mojang made it that way in the update.

bummer, So i guess i need to use two different tools