Something's going on with my posts!

I'm having trouble when I'm sending messages, and sometime posts. When I try to write someting, and I click on Send, sometimes (Which actually means almost always since...some time already) the message or post is not send or posted, and a red message apears over the white writing box that says "You must write a message in other to post", or something, as if I hadn't written anything.

Is anyone else having this problem?

Hm... I haven't had that problem on here.

Well...I think that the "switch editor mode" is part for the blame, since it always appears on, and wen I deselect it, it closes the white box, and then after reselect it my text is gone, but I'm not sure