There is a problem when I have upgraded wordpress from version 1.5.2 to 2.0. The trackback does not work! Everytime I write a new post I need to manually send trackback to blogtal.com and petalingstreet.org.
Anyway, AhKnight has a quick workaround for the trackback bug in WordPress 2.0. You need update the ‘to_ping’ field in ‘wp-post’ database table to a zero length empty string.
Read his post for more information: Fixed WordPress 2.0 Trackback Issue
Edited: Yes, It really work. I saw my trackback ping at blogtal.com and petalingstreet.org. Great Job Knight!