Color select edge

I'm not sure that the bug...
very thin backlight selected edges

http://screencast.com/t/yfjtdJmt1hlv

BUT if you include View>Object_shading>Show_unselected_object_in_transparent

all good view selected

http://screencast.com/t/GPRHGMUuAHd

Can you make a video to show this? I want to see if there is any transparent object placed in front of those selected edges?

here - http://screencast.com/t/XI9Slpc4I11

Can you send me the scene file?

scene - https://yadi.sk/d/1oTXzAULkHp83

setings - https://yadi.sk/d/uzhmphpFkHp9M

Try this
http://www.digitalfossils.com/Download/NVil-Nov-07-15.rar

Good work, thank you very mach!