I created a child of Woo Themes Canvas ver 4.7.1 per all the instructions with only a style.css as described and an empty custom.css.
It shows in the themes directory but when I try to Live Preview it I get a box with Cheatin’ uh? in it.
I have checked the permissions on all the folders and files and they are the same as the ones in the main theme which works fine.
The style.css file looks like this:
Theme Name: Canvas Child
Description: Child theme for Canvas.
Author URI: http://www.woothemes.com