Try, after reboot, to click once at the top (like there is a panel there) and then click on your bottom panel. That worked for me, it's like compiz expects panel to be on top and when you click there it understands it's on bottom.
Try, after reboot, to click once at the top (like there is a panel there) and then click on your bottom panel. That worked for me, it's like compiz expects panel to be on top and when you click there it understands it's on bottom.