I'm level 25 now, I;ve got the glowing borders on the first 6 areas (revealing the first secret level) and have completed up to and including the first epic battle.
When I started playing the game everything was fine but the last dozen or so battles that I have played when I'm finished the screen goes dark and I can see trees and towers, then it goes back to the main screen which is also black except for all the areas show up. When I try to save the whole screen is black but if I click in the right areas I am able to save.
I have been reloading the webpage (and therefor the game) and relying on the autosave slot to continue playing - sort of annoying - anybody else have this problem?
This has never happened to me, but I don't know if me having Internet Explorer updated to the max has anything to do with it. Maybe you do need to try on another browser.
I have played this game all the way through both on fire fox and IE, cant say have i have had any problems. I'd strongly suggest checking that all your browsers are in fact running an up to date version of all plug ins, i have had strange things where for some reason 1 browser its trying to use an older version of a plug in, and causes some strange things to happen. Just a suggestion.
I too have experienced this same issue. It happens very randomly. Thankfully, I've more or less memorized the game save locations, so I saved, exited, and came back in - everything was fine. It is sort of annoying though, lol. The first time it happened, I thought it was part of the game, but soon figured that it wasn't.