[MSW] Pickers: different label placement in buttons

[ABX]

Hi!

Anybody familar why button in file picker has differen placement of label than
dir picker with exactly same label?

Here is screenshot from current state of three instances of widgets sample:
http://abx.art.pl/wx/pickers_buttons_xp.png
Left button is dir picker, middle button is file picker, right button is font
picker. As you see label in file picker is moved down but I fal to see why.
Ideas?

ABX