Forgot this line ...

$g_view_issues_page_columns = array ( 'selection', 'edit', 'priority', 'id', 'sponsorship_total', 'bugnotes_count', 'attachment', 'category', 'severity', 'status', 'eta', 'date_submitted', 'last_updated', 'summary' );

Hi! I wanted this too - I fixed this in 1.1.8 by adding a custom_function_override_print_column_value() function to custom_functions_inc.php... I've pasted the code below - I'm sure it doesn't look great but your editor should be able to help with that. ;)

function custom_function_override_print_column_value( $p_column, $p_issue_row, $p_columns_target = COLUMNS_TARGET_VIEW_PAGE ) {
if ( COLUMNS_TARGET_CSV_PAGE == $p_columns_target ) {
$t_column_start = '';
$t_column_end = '';
$t_column_empty = '';
} else {
$t_column_start = '<td>';
$t_column_end = '</td>';
$t_column_empty = ' ';
}

    if ( strpos( $p_column, 'custom_' ) === 0 ) {
        # this is a custom field
        echo $t_column_start;
        $t_custom_field = substr( $p_column, 7 );

        $t_field_id = custom_field_get_id_from_name( $t_custom_field );
        if ( $t_field_id === false ) {
            echo '@', $t_custom_field, '@';
        } else {
            $t_issue_id = $p_issue_row['id'];
            $t_project_id = $p_issue_row['project_id'];

            if ( custom_field_is_linked( $t_field_id, $t_project_id ) ) {
                $t_def = custom_field_get_definition( $t_field_id );
                print_custom_field_value( $t_def, $t_field_id, $t_issue_id );
            } else {
                // field is not linked to project
                echo $t_column_empty;
            }
        }
        echo $t_column_end;
    } else {
        # this is NOT a custom field - resolve the function we will use
        # to print the field based on the field's name
        if ( $p_columns_target != COLUMNS_TARGET_CSV_PAGE ) {
            $t_function = 'print_column_' . $p_column;
        } else {
            $t_function = 'csv_format_' . $p_column;
        }

        if ( function_exists( $t_function ) ) {
            # the function resolved above exists somewhere in the Mantis API
            if ( $p_columns_target == COLUMNS_TARGET_CSV_PAGE ) {
                # for CSV output
                $t_function( $p_issue_row[$p_column] );
            } else {
                # non-CSV output
                $t_function( $p_issue_row, $p_columns_target );
            }
        } else {
            # TODO get project to print

            # --------------------
            # There is no print function for this column, so
            # I had to hack this in here. Works fine.
            #  -mmoch
            if( $p_column == 'projection' ) {
                $projection = get_enum_element( $p_column, $p_issue_row[$p_column] );
                $projection = ( $projection ) ? $projection : $t_column_empty;
                echo $t_column_start . $projection . $t_column_end;
            }
            else if ( isset( $p_issue_row[$p_column] ) ) {
                echo $t_column_start . $p_issue_row[$p_column] . $t_column_end;
            } else {
                echo $t_column_start . '@' . $p_column . '@' . $t_column_end;
            }
        }
    }
}

I believe this has already been fixed as part of 0010816

If you upgrade to 1.2.0RC2 or later you shouldn't see this problem any more. If you do, please let me know (add a note to this ticket or open a new bug report).

Thanks.