For whatever reason, we put cursors in /usr/share/cursors/xorg-x11 rather than where Xorg defaults to put them (/usr/X11R6/lib/X11/icons). As a result the "Cursor" tab in the Mouse capplet only sees the Bluecurve cursor themes (they have a symlink from within /usr/share/icons). The mouse capplet needs to be fixed to look for cursor themes in /usr/share/cursors/xorg-x11 (add path at capplets/mouse/gnome-mouse-properties.c line 651). (See bug 83450 for when this bug hit gcursor).
Works for me in control-center 2.12.
Yup.