Can you tell me exactly step-by-step how you posted so I can try reproducing what you went through? Was it a reply or when creating a new discussion?
If you need test your posts you can do it here:
http://forums.cnet.com/test-forum/
Also please let me know what browser you are using?
Any information you can give me so I can investigate this issue would be greatly appreciated.
Again I apologize for you to have to experience this.
Thank you,
-Lee
Twice today when I hit 'Edit' [post] I loose it all. ????

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic