XP L&F: Table headers don't look like native

Build : Mantis B07
OS : Windows XP
L&F : Windows XP

Please look at the image attached . Table Column headers and not aligned at the ends and also they are half (one third ??) white at the bottom. you may need to look closely to observe this.

This bug can be reproduced by any application that uses Table Column Headers an example of which is Swingset2 demo ( in <JAVA_HOME>/demo/jfc/SwingSet2 Directory )