So far this has happened for me in 2 games, warlords:epic conflict, and Cerebrus:lord of the underworld.
I have used both my facebook, and my armorgames accounts. And neither of them save games. With warlords, i press the exit button, and it saves my game. but when i close the window, and open it again. my save is gone.
With cerebrus, it should be autosaving. but it is not saving at all. everytime i close the browser, it does not save.
I have tried using both a library computer and my own laptop.
Do your other Flash games experience such a problem as well?
The two games you list save locally, do you experience the same problems for Flash games that save onto servers, like Gemcraft of Strike Force Heroes? If the save problem does not happen to server based games, it could be a problem with your Flash Player.
Uninstall Adobe Flash, reinstall it, reboot your computer. Play around with your various browsers .Try checking if you can find your local save files on your computer. (.sol files)