Placement of an image in a button

When you look at the attached image you will see an image (12x12) on a button (75x18)

The left image is placed at the bottom of the button :?
The middle image is placed at the top of the button :?
The right image is placed in the center of the button :?

At least that is what the properies bar tells me… The image tells me something else…

It looks like bottom and top placement are reversed and that the placement in the center is 1 or 2 pixels too low (there is no border in the image)…

The image on a button moves with the text as expected on Windows XP (System LAF) when the vertical alignment is changed
This must be a issue within the apple LAF.

OK, could be an apple issue…

BTW there is no text involved. Due to text issues with, again probably apple, font size I place the text over the button in another lable…