Black Studio TinyMCE appears on taxonomy pages

Hi there,
thanks for your report. After further investigation, it seems the culprit is the WordPress Page Widgets plugin, which checks for the presence of the Black Studio TinyMCE plugin, and loads it also in taxonomy pages, but in an incorrect way.
I will try to contact the author of WordPress Page Widgets, in order to find a comfortable solution for both.
In the meantime the problem can be patched by modifying the wp-page-widgets.php file as the following.

Locate the following line (1241) near the end of file
add_action('admin_head', 'pw_admin_head');
and change it to:
add_action('admin_init', 'pw_admin_head');

Then locate the following, a few lines below:
in_array($pagenow, array('post-new.php', 'post.php', 'edit-tags.php'))
and change to
in_array($pagenow, array('post-new.php', 'post.php')) ||(in_array($pagenow, array('edit-tags.php')) && isset($_GET['action']) && $_GET['action'] == 'edit' )

Yes, I already reported this issue to WP Page Widgets author (see thread). Actually waiting for their answer.

Thank you Metalscorpion. I will include this change in the next release.