missed canvas events for CanvasRect items when root group transformed?

["Robert W. Anderson" <rwa alumni princeton edu>]

I believe I've found a bug in the canvas that arises when an affine 
transform has been
applied to the root group.

I was wondering if this was a known problem or if I should submit a 
minimal test case
to demonstrate it.  The problem is that, after applying an affine 
transform to the root
group on a canvas, CanvasRect items no longer get mouseover or any other 
events.  This
is NOT true of CanvasEllipse items.  The transform I'm using is an 
inversion and offset of the y-axis, whether that's necessary to see the 
bug I'm not sure.

Anyone seen this?

I am in fact using the gtkmm interface, so it's possible the bug is 
there, but I was under the impression that gtkmm was mostly a straight 
m4 transformation of the gtk+ code.

Thanks,
Bob