Serious issues:

1. Backgrounds of “contents” and “sidebar” are not the ones set by the customization and also become transparent. Basically because IE cannot respond rgba specification.

2. Menu items of the menu bar in the header are listed vertically.

3. Adventure customization is done in functions.php.

4. Function adventure_ie_css() is very compact one to cope with isuues 1. 2. , but not activated in the original.

5. The following was necessary and worked fine. (See functions.php in adventure-child.

6. function remove_thematic_actions() {
remove_action(‘wp_head’,’adventure_inline_css’,50);
}
add_action(‘init’,’remove_thematic_actions’);

add_action(‘wp_head’, ‘child_adventure_inline_css’, 50);

7. Include adventure_ie_css().

8. Issues 1. 2. were almost solved. But “content” background is not transparent at all, whereas sidbebar background i s half transparent.