I'm using a brand new install of wordpress 3.8 and latest woocommerce. I setup my attributes and products with variations. I followed the video setup and I have one product that has the additional info tab but my other products does not.
I'm only entering the weight and dimensions at the individual variations level, not in the shipping section. The additional info tab only shows up when I add weight or dimensions on the shipping section.. I can't get the tab to appear when I enter in the info at the individual variations level.