When I first started GNOME on xgl I was offered an option as to whether I wanted to use the GNOME keyboard settings or the X keyboard settings. I went with the X settings and wound up with US keybindings. Given that this choice is not offered on a normal xorg I think I'm going to go ahead and confirm this bug.
The shift-backspace problem is no longer present. Version information: Ubuntu Feisty xserver-xgl 7.2.0.git.20070224-0ubuntu3 -- xgl does not honour keyboard layout https://launchpad.net/bugs/32857 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs