Fixed size button shrinked to content

Vaadin 6 / 7 / 8
1

Hello!

I have button with fixed size width, own theme and I cannot understand that my button looks wrong - my button shrinked to content width: http://files.rsdn.ru/12237/invalidbuttonstyle.PNG

Here is computed example to test: http://jsfiddle.net/g3GBZ/2/

Thanks in advanced,
Anatoly