Does Fluther have separate system integration testing and user acceptance testing environments?

I’m asking this question because of

http://www.fluther.com/87157/is-it-just-me-or-is-fluther-hosing-up/

and

http://www.fluther.com/87161/why-cant-i-reply-to-this-question/

I lost a couple of answers too yesterday.

So when the programmers make a change or fix a bug does this go straight to the production environment when unit testing is complete?