OFFSET x y not working with AGG

[zanollim]

If I use simple line rendering [mapserver-6.0.0-beta5], the OFFSET x y works correctly.

If I use a little more complex line rendering like this, the OFFSET x y seems not work:

Here the symbol definition

SYMBOL
    NAME "1.06.01"
    TYPE vector
    POINTS
        1 1.2
        1 0
        -99 -99
        2 1.2
        2 .8
    END
END

Here the map style

STYLE
    SYMBOL "1.06.01"
    COLOR 0 0 0
    SIZE 20
    WIDTH 1
    OFFSET -10 -99 # does not work
END