Does anyone know how to drop a diễn đàn from your favorites? There is no red 'drop' button like on the other yêu thích categories.

the only way I know: go directly to the diễn đàn that bạn want to drop from your các sở thích and scroll down a little and click where it says "remove from my updates" in the các câu trả lời bar, and that's all.