I have no settings that block the javascript. I have found out something strange about my problem. It seems that I only get the error when I edit the module in the dutch language (nl-NL).  If I edit that same module in English it works fine. I have checked my code but haven't  anything that could result into an error.
I get the following javascript error:

Line : 37
Char: 598
Error: Invalid argument
Code: 0 
Url:
http://www.mysite.com/Providers/HtmlEditorProviders/Fck/FCKeditor/editor/fckeditor.html?InstanceName=dnn_ctr1125_EditArticle_teContent_teContent&Toolbar=DNNDefault

I am using dnn 4.5.3 and use the editor that comes with that version of dnn.

Actually we are experiencing the same problems here.  We have upgraded to DNN 4.7 and the issue is on more than one persons client browser, one running IE7 the other running IE6.  We are experiencing this problem when we navigate down into our Wiki and edit and then try to save.  We get the same error word for word.  Please advise how to fix.

Now we've upgraded to DNN 4.8 and still have the problem.  Ignoring it won't make it go away and several people have stated they are experiencing this issue.  Please advise us as to what we need to do to help you help us.