font size and window maximum

[William Xu]

I'm using this font: 

  -apple-Monaco-medium-normal-normal-Regular-14-*-*-*-*-*-iso10646-1 (#x50)

I find that however I try to enlarge the emacs window to maximum, there
is a noticable gap at the bottom(see attachment).  If I change the font
size to 12, it will be much better.  

Could this be improved? 

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| GNU Emacs 23.0.91.1 (i386-apple-darwin9.6.0, NS apple-appkit-949.43) of
| 2009-03-02 on zen.local
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gap.png
Description: PNG image