tuplets interferring with slurs

[Matthew]

Do slurs and tuplet brackets know about each other?

The following code produces a not very nice slur on the second tuplet.
Additionally, it is very sensitive to the TupletNumber Y-offsett

\version "2.10.33"

\relative c'' {         
        \time 2/4
        \tupletUp
        %\override TupletNumber #'Y-offset = #3         
        \times 2/3 { d8( b)( d) }%these slurs are nice
        \times 2/3 { b8( d) b } %this slur is very high and ugly
                                %it also interacts strongly with
                                % TupletNumber #'Y-offset                       
                        
}

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