I noticed before that at some questions there is answer(s) with empty text and as subject other question or Bug.
It happened to me today so i can verify what is going on.
I replied at 180986 [22] Fury Warrior [Question] 14:00 04-04-10 topic "heal mercenaries"
then i replied at DMDM [31] Ghost Stalker [BUG] 11:18 04-04-10 topic "Blue item=0 craft points, yet again"
It seems like there is none reply but when you open it you see
Re: heal mercenaries 16:55 04-04-10
with no text.
After that i reply again and this time my answer was posted normally.
Perhaps this will help more...