Apparently I hit some kind of glitch here. I'm on Dinky Island. I already did the parrot thing, and I already found the X and the shortcut. I began wandering back through the woods to find the box that was nailed shut, and now I'm completely stuck in the jungle. After googling for a bit, it appears that I'm not the only one. At least three other people from this site have hit this issue and no one could help them. Here's another case (click link and then highlight the black text).