X-Plorer look & feel error

Hi, I 've been working with X-Plorer for quite some time without problem, until a couple of days ago when the windows look & feel has disappeared! Button borders, sliders, tree nodes etc. are not displayed at all! Clicking on Tools → Customize → Details I get this (also attached, I hope):

 java.lang.NullPointerException at javax.swing.border.EmptyBorder <init()> (Unknown Source) at com.sun.java.swing.plaf.windows.WindowsTableHeaderUI$XPDefaultRenderer.getTableCellRendererComponent (Unknown Source) 

etc. I didn’t touch, installed/uninstalled anything regarding Java. I use jdk 1.4.2_08 since months. Any help would be appreciated. Best regards, John.

I’m trying to track down this bug. Could you tell me what XP visual style you were running that caused this bug? If you could email me at joshua.marinacci@sun.com it would be great. Thanks, Josh