I'm editing a new post. I upload an image and insert it into the post. When I try to edit the image, the image editor dialog box appears blank and Firefox asks me to DOWNLOAD the editimage.html file. This also happens when I try to edit links (link.htm), paste text (pastetext.htm) and paste from Word (pasteword.htm). The only dialog boxes that open correctly are the upload/insert media ones.
How can I fix this ?