Hi Andrew.
Thank you for the reply.
Yes, I am currently using 2.1 after upgrading my site from 2.0.
I do see the get_stylesheet_directory_uri to get_template_directory_uri change in the code, but get_template_directory_uri was still pulling the child dir path in my child theme when it was activated instead of the desired parent path.
After days of trouble-shooting the child theme, I eventually had to go back to modifying the updated version 2.1 theme files. :(
My sense is that the theme settings/options were somehow incorrect in the database, which was confusing the child theme.
John