A problem for me is that "grid style" does not render at all in Ajax (I can't understand why!)
I picked up an interesting tip yesterday from QlikView's Kenneth Lewis. How about using a Container control with multiple list boxes? I thought about it and then tried it out. I think that it works quite nicely. By adding several list boxes and then setting the Appearance property of the Container to "dropdown at top", I get a result that works in both QV and Ajax.
It is not a perfect replacement for the grid-style multibox but, in some ways, it is better. I like the fact that you have the list box icons available and it is easier to see the Green/White/Grey.
Have a play with it and see what you think.
Stephen Redmond is CTO of CapricornVentis a QlikView Elite Partner