userpoints_get_default_tid() does not return a value

This function causes problems on the basic views, as the default_tid is never returned:-

function userpoints_get_default_tid() {
variable_get(USERPOINTS_CATEGORY_DEFAULT_TID, NULL);
}

This fixes it :-

function userpoints_get_default_tid() {
return variable_get(USERPOINTS_CATEGORY_DEFAULT_TID, NULL);
}