a .values argument has been added to set_na_values() and set_na_range(), allowing to pass a list of values a .strict option has been added to set_variable_labels(), set_value_labels(), add_value_labels(), remove_value_labels(), set_na_values() and set_na_range(), allowing to pass values for columns not observed in the data (it could be useful for using a same list of labels for several data.frame sharing some variables) (#70) copy_labels() is less restrictive for non labelled vectors, copying variable label even if the two vectors are not of the same type (#71) a .strict option has been added to copy_labels() (#71)