I fooled around with "F12 development tools" a bit, but I couldn't find any settings that made any difference. I restarted IE and my PC a number of times but made no difference.
Then, all of a sudden it started working again – posts I've read are grayed out. I swear I made no setting change between not working and working.
Maybe I made a setting change, then restarted IE, and then it started working, but that's not what I remember.
Or maybe they changed something at backpackinglight.com. At one point script error reporting was enabled and I noticed lots of script errors here, but not on other sites.
I could try fooling with F12 development tool settings again and try to get it to fail again
This proves that if you have enough monkeys typing, eventually one will type the bible : )