Comment 65 for bug 600178

For everyone's benefit, there is away around this (and maybe works with other wms?):
    bash -c "sleep 2; compiz --replace"

put this into /etc/X11/Xsession.d/44x11-nvidia-settings

# This file is sourced by Xsession(5), not executed.
# Setup nvidia settings

NVIDIASETTINGSRC="$HOME/.nvidia-settings-rc"
NVIDIASETTINGS=/usr/bin/nvidia-settings
NVIDIAMODULE="$(grep nvidia /proc/modules | cut -d ' ' -f 1)"

if [ "x$NVIDIAMODULE" == "xnvidia" -a \
     -x "$NVIDIASETTINGS" -a \
     -r "$NVIDIASETTINGSRC" ] ; then
    $NVIDIASETTINGS --config="$NVIDIASETTINGSRC" --load-config-only
fi