(about half way down that website page...)
Thanks. Looking at the documentation i think it might be that I don't have a swap partition. I generally don't bother with one when I have enough ram as I stick to CLI apps that don't really hit the ram hard in the first place, and I guess I just forgot that it is where things are stored during hibernation, so I'm making a nice big fat one. I'll post if that resolves the issue.