Hi,

I'm getting a warning message each time i'm trying to create account with a facebook account : Notice: Undefined index: preferredUsername in rpx_core_form_user_register_form_alter() (line 93 of /var/www/drup7/sites/all/modules/rpx/rpx_core.module).
> It seems it's not getting the user name from facebook i guess, any help ?

Many thanks