Qss and bottom-border

[daugoh]

Hi,

I try to define a widget border using a qss file.

@
QToolButton
{
border: 1px solid #000000;
}
@

It's great and very simple !
However I have a problem.
My bottom-border isn't visible.
I had to define a border of 2px to see it.
I mean the bottom border is always shifted by 1px.
It's very strange, isn't it ?

Is it a known issue or I don't know how to use it ?

Thanks in advance for your answer