Text orientation in toolbar on Mac

I would like to see the text labels in the main toolbar in Thunderbird 3 
to default to being under the images in Mac Tbird.  It is a nuisance to 
have to rearrange the code in a theme to get the labels oriented that 
way in the Mac.  I do not see the point of making the toolbar buttons so 
wide.  One can not get as many on the toolbar.  What was the point of 
making it that different from the arrangement in the Windows version?