WordPress MU is configured well, just had to put these lines :
AddType x-mapp-php5 .php
AddHandler x-mapp-php5 .php
In the htaccess of the server, so that I don’t have any 500 errors in admin
I guess Buddypress is not pointing to the right thing when it wants to create the tables, but there are no errors displayed
If someone can be kind enough to send me the basic sql table that are put in our database right after the good install of buddypress, maybe I could go on testing other stuff…