[@berberber Member 18 years, 1 month ago]

Solution :

in includes/template-functions.php

replace

switch ( bb_find_filename($_SERVER) ) :

by

switch ( bb_find_filename($_SERVER) ) :

[@berberber Member 18 years, 1 month ago]

Solution :

in includes/template-functions.php

replace

switch ( bb_find_filename($_SERVER) ) :

by

switch ( bb_find_filename($_SERVER) ) :

[@berberber Member 18 years, 2 months ago]

Got it !, this was because of a funny encoding header of my hoster…