Pyqt styleSheet not working at 100% in maya

Hello guys , I was working on a my UI where i decided to color the background of a slider of a color between yellow and red based on the slider % .

Everything works only thing that bugs me a little is that when i set the background color it will color the whole slider , the button too.

That happen only in maya if I do the same in qt designer and create a preview it colors only the background. I am not really into stand alone pyqt UI to test it out of maya.

Is it there any solution for that?

Or it s just how maya reads the pyqt ??

example image
http://www.freeimagehosting.net/r654l

after messing with the palettes in the designer i got some weird weird result so maybe it s something related to overraiding some palettes or something .
I really hope someone can open my eyes!