I am relatively new to the WordPress platform. I am in the process of changing the theme of an existing site. The new theme will be a customization of this commercial theme: http://www.dessign.net/vertical-theme/
I want to do the customization in a child theme.
Activating a child theme makes the dynamic sidebar inactive and the widgets of the existing site unavailable (the sidebar is active and the widgets are available when the parent theme is activated).
The problem occurs even if the child theme is nothing more than a stylesheet that has one line of code importing the parent theme’s stylesheet.