How is your CSS loaded? Do you do anything special to it? Minify it or something? Have you looked at the debug log to se what the CSS requests are doing, if anything?
I have exactly the same problem as the topic starter. I use one of the Genesis themes, and I’ve tweaked the child theme a bit. Now all my tweaks are gone and the theme looks exactly like the original (before my tweaks). Please note, however, that I do not make changes in the child theme itself – I use the Custom CSS plugin for the tweaks. I use Autoptimize plugin to minify css, but my child theme CSS is excluded from minifying.
Meanwhile I have restored v. 1.5.3 of WP Super Cache and my CSS is working properly.
I am not able to check my debug log, I enabled logging and had clicked on the link ‘Last logged to’ and when it asks me for a username and password, I input the Username/Password into both fields and it keeps asking me for a password and not logging me in.
As far as how my CSS is loaded, I am using the ‘Simple Custom CSS’ plugin for all of my CSS for my child theme.
