Hello guys,
The programmer on my team tried loading a spine character in a test today, and It turns out we had very weird problems with the textures in Meshes. He tried making an atlas by himself using texture packer and the images I provided in Spine project and everything seemed to work fine, except for some problems with premultiplied alpha (texture packer here http://www.aurelienribon.com/blog/2012/06/texturepacker-gui-v3-0-0/ doesn't seem to have a premultiply alpha or bleed option).
Here are the two results:

The hand that holds the gun, the gun and the shoulders are no meshes, so they seem to work properly.
I think spine still does some weird stuff when exporting the meshes to the atlas since he's using the same painting code for both images. Also if somebody could suggest some way of premultiplying an image alpha in order to avoid these kind of problems it would be much apreciated 🙂 .