It took me a lot of time to find which mods make the Facebook App has error so I want to share those here for anyone who experiences errors can save time to fix.

1. Chiplove.9xpro - View more thread same category 1.2.2 full
http://www.vbulletin.org/forum/showthread.php?t=270803
This Mod causes the first post of thread does not show.
2. Advanced @User Tagging v2 (vB4)
http://www.vbulletin.org/forum/showthread.php?t=242733
This makes content of posts contain user tag does not show on FB APP.

Anyone knows other conflicts please share to save time when deploy FB APP.