smoothness theme problem with 1.10.4

if i use smoothness theme CSS from 1.10.3 it looks ok but with 1.10.4 it's much darker.

1.10.3:

http://jsfiddle.net/FlasJunior/zfEAQ/7/ > ok

1.10.4:

http://jsfiddle.net/FlasJunior/zfEAQ/6 > bad :-/

Here you can see a comparison of some images:

http://jsfiddle.net/FlasJunior/zfEAQ/9/