Most sophisticated CSS rendering bug of all time (IE9)

Question

Take a look at this in IE9:

http://jsfiddle.net/dalgard/n6PDB/show/

screen dump:

Answer 1

the line has to do with the border of the parent container AND the inner div. If you get rid of the inner div OR the border it resolves the issue. I don't know if this will help but that's what appears to be the problem.