Transparent faces even with Limit Selection to Visible I was wondering why the objects of this file are always displayed transparent in Edit mode, even with the Limit Selection to Visible option enabled, and no Shading enabled in the 3D properties panel. I think I miss something. Here is the file.

Thanks a lot.
Your 3D View far clipping distance is set to a very high value. The floating point representation of depth in Blenders Viewport is not layed out to handle these high values.

You can easily recreate the problem, by 


Opening a new Blender file.
Selecting the cube and going into edit mode.
Switching to orthographic view.
Setting the View > Clip > End to 100000.


In your file, the end clipping distance is set to 1km. However, since your Scene > Unit Scale is set to 0.001, this value translates to ~1000000 BUs.