I think I read of it happening to somebody using Linux.
Can you possibly provide a snapshot of it. If you're using Win XP there should be a utility that allows you to take snapshots of designated areas. Otherwise use the printscreen on your keyboard. Include it as an attachment.
WHich version of LW are you using? WHich version of Java do you have?
The other way to arrange files is to click (or double-click which will reverse the order) on the column headings so you can arrange them alphabetically by filename or Status or File Type or Size or Speed or Time, etc.
Fabion just beat me to the button! lol