Problems with appending values to an array

Hi, I have a problem appending another values (key => value pairs) to an already assigned array. ---------------8<------------------ $array1 = array( "bla" => "foo", "bar" => "baz" ); $s->assign("arr",$array1); $array2 = array( "fasel" => "blubb", "foobar" => "foofoo" ); $s->append("arr",$array2); ---------------8<------------------ Already turns out in (debug console): ------------------------------------- {$arr} Array (3) bla => foo bar => baz 0 => Array (2) fasel => blubb foobar => foofoo But what I need is: ------------------- {$arr} Array (4) bla => foo bar => baz fasel => blubb foobar => foofoo Why does Smarty create a new key there? Seems to be a bug for me, as I append the values... append_by_ref results in the same! Greets, Joscha