Where did you post it? sometimes threads do get deleted (for multiple reasons - once a thread was deleted because the reply's on it were "not nice"(acctual quote)).

On your profile thingy it says you have 2 threads but it only displays one (this one).

Yeah, once I posted a thread about orange text (if you payed attention to the forum, you know what I'm talking about, I'm not telling more) which got deleted instantaneously, I only found it using shearch.