I see a "3" character in the center of the frame.
And the texture is the default one (which means file not found).
I've just updated the RotatableGroupTest to make the FPSCounter use the correct texture. So please update your CVS.
But it's strange that it is in the center of the screen

. It should be located at the lower-right!
Well, anyway. These sole characters of the FPSCounter (which are more than three, but "64.34" e.g.) are not dropped, but displayed properly. So I guess I cannot help you with this. Or maybe we're talking about different things.