PHP Toolkit 2012_2 CustomerSearchAdvanced

Using the new PHP Toolkit 2012_2 (not the old one) with CustomerSearchAdvanced I get a list of empty fields with each customer record ala:

[searchRowList] => SearchRowList Object
                (
                    [searchRow] => Array
                        (
                            [0] => CustomerSearchRow Object
                                (
                                    [basic] => CustomerSearchRowBasic Object
                                        (
                                            [accountNumber] =>
                                            [address] =>
                                            [address1] =>
                                            [address2] =>
                                            [address3] =>
                                            [addressee] =>
                                            [addressInternalId] =>
                                            [addressLabel] =>
                                            [addressPhone] =>
                                            [altContact] =>
                                            [altEmail] =>
                                            [altName] =>

Just a sample - it continues through the whole record just showing values for the columns I specified in $search->columns.

Is this a know bug or am I doing something wrong (the old toolkit just brings back the columns I asked for)? I could do without all the duplicated data slowing things down even further!