Using DNN version 4.05.03...

I first noticed this begin to happen at least a week ago.   I noticed this in the Bio section of the account profile.  Now, this problem that was seemingly isolated has spread to my ENTIRE SITE.  The FCKeditor is not being displayed on the Text/HTML Module, or anywhere else that it is supposed to be shown.  Instead, all users are being met with an error page in the place of the text editor.  It states:

"Internet Explorer cannot display this webpage"

In FireFox, the end-user just sees white space in the place of the editor.  This is worse - there is no feedback for the end-user...

What is causing this???  I have confirmed that this is happening to all users (admins and non-admins).  Also, upgrading DNN is not an option right now.  There is much work that would be needed to be done to ensure that our modules and custom providers will be compatible with the current version of DNN. 

I forgot to add something else...

When I read posts like mine, I am a follower of the "I don't believe you" philosophy.  Keeping that in mind, I will tell you that I am 100% sure that no one has touched the web.config or any of the modules where the editor is loaded since prior to the first break being noticed.  In addition, the only touching of the FCKeditor files was when I browsed them recently to see if there was a config file there - but none of the files were opened.

What about reinstalling the Provider then.

DNN FCK Provider 1.0.9