Don't listen to hiessies or whatever his name is when he's in a bad mood. He has an interesting way of putting things
The problem from what I can see is either the normals, or the fact that you might have some back-facing polygons. Lol, it's almost the same thing.
Go into edit-mode, select all the vertices, and press CTR-N and then unwrap it again. If that doesn't work, when in UVMAP mode (the F key) go to the UVMAP - editing panel, and select "two sided". It's the panel that is normally just 'editing". That might fix your problem.
Better still, upload the file and I or one of the other blenderheads could look at it for you.
The model itself is fairly basic, but I realise you aren't a pro yet so it doesn't bother me! I would add some edge-loops around where you want the arms to bend, so that you don't get ugly distortions when animating. Also, add some more polygons to the arms and make them smoother.
Good start mate, I hope you work the problem out!!
Greenlig
Blender3D - GIMP - WINXP - DBPro