Missing .com after zone-bf in links

the file had been changed on the server ... everything is in order now.

I have edited stylesheet. Besides, it worked very well until this morning

Your Portal Version: 1.0.0RC3
Your phpBB Type: Standard phpBB3
MODs installed: Yes
Your knowledge: Beginner
Boardlink: http://www.chevauxdecourse.com

What have you done before the problem was there?
I try to add forum link in overall_header

What have you already tryed to solve the ...