Domain Mapping issue : url are displayed like ->


Here's my configuration :
WPmu : 4.0
Domain Mapping :
Sunrise.php is in the wp-content/ folder and activated in wp-config

I'm experiencing a an issue with the domain mapping.

When I copy a new website, assign it a domain, all URLs in the website are displayed this way :

When I'd like it to be displayed this way :

I found this topic with the same problem :
But resinstalling didn't help me.

Thanks a lot