How can we ensure header and table columns are aligned.

I see a slight difference in alignment for header and table columns. How can this be fixed so both table header and table data appear totally aligned.
[157 byte] By [screen_simua] at [2007-11-27 7:06:00]
# 1
What look and feel are you using?
kirillga at 2007-7-12 18:57:15 > top of Java-index,Desktop,Core GUI APIs...