http://wiki.fckeditor.net/Developer%27s ... ion/Styles
I was seeing this error for the longest time: "Error loading ...fckstyles.xml Do you want to see more info?" The problem turned out to be that my web server (or web application server) was not returning the file with the appropriate
Content-Type: application/xml
The fix was simple to set this header explicitly.
@headers["Content-Type"] = "application/xml"
render :action => 'fckstyles'

Re: Error Loading styles?