Maximum size and resolution for the attached photos are not respected

Even if i set a size and resolution limit for attached photos, images of every size and resoluzion are uploaded, i only get this warning messages:

Warning: Parameter 1 to _fbsmp_file_validate_image_resolution() expected to be a reference, value given in file_validate() (line 1670 of /var/www/mysite/includes/file.inc).
Warning: array_merge(): Argument #2 is not an array in file_validate() (line 1670 of /var/www/mysite/includes/file.inc).
Warning: array_merge(): Argument #1 is not an array in file_validate() (line 1670 of /var/www/mysite/includes/file.inc).
Warning: array_merge(): Argument #1 is not an array in file_validate() (line 1670 of /var/www/mysite/includes/file.inc).
Warning: array_merge(): Argument #1 is not an array in file_validate() (line 1675 of /var/www/mysite/includes/file.inc).