So I'm playing Tales of Monkey Island, Chapter 3, and have finished all of the expression-hunting (saying "Arrr" to everyone, bringing De Cava yellow bile, cleaning and looking at the painting, looking at the monkey figurehead, and surviving the first face-off round), but one of the eye expressions seems to be missing. I already have fisheyed, lazyeyed and crosseyed.
After giving up hunting for more expressions, I checked various walkthroughs on the Internet, but it seems like I've done everything. I have double-checked by trying to do all of the expression hunt steps again, so I can confirm that I actually have done all that should be done.
In case it matters, I have the TOMI version that is sold on the Telltale site, not the Steam one. I'm using 64-bit Windows 7.
Thanks in advance.