Not recently, but I have now no way of comparing the two versions to see what's going on and no way of reverting if something is amiss. That's a bit of a setback and more of a 'downdate' than an update.
I have always used the access to the standard CSS files to determine what code to modify (along with the syntax etc), before adding it to my custom CSS. I can't do that now, which is going to make any future additions to the custom CSS far more difficult for me to accomplish.
