A couple months ago I ordered an extra cross-blade for my Magic Bullet. The new one I received has shorter blade-arms than the original cross-blade, and it doesn't work as well. The original can completely chop up a handful of baby carrots, the new one always leaves a few carrots tumbling around untouched. I've tried a couple side by side tests. Twice, when I couldn't get all the carrots chopped with the new blade, I screwed on the original blade and then was able to get the rest of the carrots chopped up.
The new blade works ok for smoothies, and it wasn't until I checked this website that I learned that's all it was meant for, but I'm really disappointed in this decrease in versatility for the Magic Bullet.