Rendering Impostors - Direct3D9 Error - TEXTURETRANSFORMFLAG

I'm getting this error while rendering imposters in the scene (the impostor page seems to render ok):

Direct3D9: (ERROR) :Stage 0 - Count in D3DTSS_TEXTURETRANSFORMFLAGS must be 0 when programmable pipeline is used

Any ideas?

Thanks!

This has to do with our using:

camera.setCustomViewMatrix
camera.setCustomProjectionMatrix

and is not specific to PagedGeometry.