I am new to Child Themes. Built a Child Theme for TwentyTen and it worked great for making changes to CSS. Changes in Child Theme style.css were accurately reflected as overriding the parent style.css.
THEN, I upgraded to TwentyTen 1.1. Now none of my Child Theme stylr.css changes appear even though the child theme is chosen in Appearances and the Editor shows that the child theme style/css file is presnet. A check of the web page source code in a browser also shows this child theme style.css file.
Can anyone shed light on what is going on.