[merpez]

I had this problem too for a while. I ended up quitting Terminal, and giving it a rest for the night. When I came back to it this morning, everything was ok. Sort of mysterious. You might try quitting Terminal, and see if that helps. Is it possible that you have the httpd.conf file still open? That created some issues for me as well.

Sorry I can't be more help, but it was definitely a process of trial and error!