XNA to Blender | Wrinkled Models?

Hi everyone.

I apologise in advance for a question that probably has an obvious answer, but I haven't been able to locate help through Google or looking through the forums here. I have the latest version of XPS and the latest version of Blender, but when I import the model (.obj) with textures and all, into Blender, even after smoothing, the models look wrinkled:



I've been following this tutorial over on deviantART: [You must be registered and logged in to see this link.] and that tutorial has served me well. But, I can't for the life of me figure out why my models suddenly render wrinkled like that.

I'd be eternally grateful for any help I might receive.

Just saying:
The latest Blender Version is 2.71 ... you are using 2.70 ... and Blender 2.70a is the latest stable release from the Blender Foundation

How does that help make the model unwrinkled?