I've just installed this plugin and working great but I've spotted a weird issue. One of the editors on my website just told me that whenever they try to create a post/page, following code will be added to their post:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> </head> <body> </body> </html>
Here is the screenshot as well: http://hardcoregameriso.com/images/issue.png
Now I've tried to replicate the issue but I found no problem on my end probably because I'm an admin and he's an editor. When I deactivate the plugin this issue went away so there must be something in the code that's causing this.
If you can look into this I would be appreciated. Thanks in advance!