Okay, I loaded Wasteland Defender and played a quick game and it worked fine. So it's your system. Let's try and narrow this down.
First, disable the new addons and see if you can now save scores. If so, then it's a conflict with one of these. Add them back one by one and play a game after each one to test.
If it's not the addons it could be something in 1.1.3. I am still at 1.1.1 and am afraid to upgrade to test this as I don't want to break mine (just in case). Try the addons first and if that doesn't work we'll try the second part.
Also, make sure your permissions are set right and that the slugs of the games match exactly the name of the swf file. Not that I think it's either of these two issues because you said the games had been working before.