WYSIWYG metabox

No, it has not been solved. You can only use the simple textarea option type due to known issues the content editor has with drag & drop.

Ok thanks Derek

In 2.4.2 you can now use a filter to activate the editor. Here’s a link to the changelog that explains a bit on how to use it. https://github.com/valendesigns/option-tree/blob/master/readme.txt#L126