Consider attached image: FC_Win_ComboCmp.PNG
Image shows comparision of height of "Look in" combo of native windows XP file chooser dialog
and java file chooser dialog.
Image clearly shows java combo is around 2 pixel bigger than native combo.
Making it same as windows will give it good compact effect just like native.
Consideration:
Both the combo boxes are using same font.

###@###.### 2004-03-12