Test, Test, part 2
I found the workaround -- it's annoying but useful. I'm posting it here in case anyone else is having the same problem with blogger. Basically, blogger keeps "loading" in the input window, which makes it impossible to type anything at all. If you're having this problem (and I was having it on two separate laptops, though running the same browser), then when you get stuck on the "loading" new post screen, hit "Save now," and then go to "Edit post." You'll be able to type just fine in the "Edit post" screen. It's only the "new posts" that don't seem to be working (at least for me).