Multilingual site and submit search form

Hi
I'm using a multilingual site with the language in the domain like
http://fr.example.com
http://en.example.com
...

After being enabled Custom search ( and Custom search internalisation )
When I try to search "something" the path after submitting the form is

http://fr.example.comhttp//fr.example.com/search/node/something

(http// is exactly what I get in the url )