Ah, thanks! That gave me enough to go on. Rebooting on its own didn't help, and I went into CompizConfig and "Resize window" was checked. I unchecked and rechecked it and it didn't work. So then I did the following to determine what compiz items were installed and reinstall them:
When I went back in, there were LOTS of Compiz settings unchecked, but this time checking the box allowed me to resize immediately. Thanks for your help... just needed a small pointer.
dpkg --get-selections | grep -i compiz
sudo apt-get install compiz compiz-core compiz-gnome compiz-plugins-default compizconfig-settings-manager libcompizconfig0 python-compizconfig --reinstall