Strange error when posting updates

Hey Guys!

I`ve got an strange error when I post any kind of updates. I user BuddyPress Corporate Theme.

The error is:
Warning: parse_url(http:///1.1/comment-check) [function.parse-url]: Unable to parse URL in /home/derekmelo/www/wp-includes/class-http.php on line 120

Do someone knows how to fix that?

Thanks

Derek