Mesh flipped compaired to armature

[Your Computer]

That's an issue i ran into as well that i couldn't figure out how to fix (though my test was in reverse compared to your's), that's why i mentioned in the wiki, "Do note, though, that this only prevents the ModelView from erroring out" and "there is no guarantee that your model will look and work exactly as it does in Blender."

When comparing a .dae file generated by Maya and a .dae file generated by Blender 2.6, there is very little difference between the two. Most noticeable differences, however, which aren't many to begin with, are within the library_visual_scenes element. From this it is impossible for me to figure out who's at fault: the game engine's COLLADA parser or Blender or the user's armature set-up. Nevertheless, it is interesting to read the Blender notes on the armature support of Blender 2.6.