It just wouldn’t be a system update if it didn’t break Suspend.
If, for whatever reason, you have been moved to install the latest version of the Nvidia drivers—eschewing the always classy, always out of date nvidia-glx package—you must must must re-install after a kernel upgrade. The reason being that the driver compiles a custom kernel interface that is, in all likelihood, now broken.
Bonus tip: How do you shut down the server so that you can install the driver?
sudo /etc/init.d/gdm stop
sudo /etc/init.d/kdm stop
for you Kubuntu people. (What’s wrong with you?)) (Hat tip: TheOS)