I'll try that, thanks.
Unfortunately I won't be able to try it for awhile though... I can't use my browser while the game is running since there's no way to pause the stupid game. I swear I quick saved before I exited but I loaded it back up to find myself quite a ways away from the aforementioned problem area. Now I get to repeat a whole bunch of stuff AGAIN (and again and again).
This game is sooo frustrating
Also, it's clear that the designer of this area intended for that chest to be some sort of 'explorer bonus' with the pillars sole purpose to provide a jumping platform to get to it, but forgot to make sure it would work in reverse, which it does not.