How to ensure header and column data are aligned using JTable

We have a JTable but it looks like header cells are a bit misaligned from table column data. How can this be fixed?
[122 byte] By [screen_simua] at [2007-11-27 7:34:53]
# 1
I asked you a question in your previous posting on the exact same subject and you never replied. Why should i bother again?
kirillga at 2007-7-12 19:15:24 > top of Java-index,Desktop,Core GUI APIs...
# 2
We use Windows look and feel
screen_simua at 2007-7-12 19:15:24 > top of Java-index,Desktop,Core GUI APIs...