Resize Stack Differences on Mac and Windows

[Ray]

I'm not sure how many versions back this goes but apparently the 
following script works differently on a Mac and Windows with 6.5.2:

    on resizeStack
       put the ticks
    end resizeStack

On Windows the message is sent continually as long as the mouse is down 
and I'm resizing the stack.  On a Mac the resizeStack message is sent 
just once when I let the mouse up after resizing the stack.

Does anybody have any experience with this anomaly?