I hired a programmer to fix this issue for me and he said:
“I figured it would be a javascript issue, I just had to run the script through a beautifier and figure out where that hash sign was. . . It was just a bit of demo code that the developer of the theme didn’t remove. I checked their demo page and it had the same issue.”
I thought you might like to know so you can fix this issue for future releases (maybe some of your other themes have this too, I have no idea). Presumably other users should be having similar issues, I’m slightly surprised no one has reported it before.
Thanks.