I have tinyfck editor installed on my osCMax website because of file manager/uploader.
I don't know why but in admin/orders/details, tinyfck is the default editor for comments and doesn't stand special characters and some </p> and <br /> are appearing when comment is updated. This bug doesn't appear for article or products editing with the editor.
1- fix this special character bug or remove the tinyfck editing for comments in admin/orders/details (I don't know how...)
2- install the spellchecker in the tinyfck editor.