Me again!!!
Now that we're running Drupal 6.25 we needed to upgrade our wysiwyg editor. We chose ckeditor/ckfinder as the pair. Installing it seemed easy enough and went smootly. ckeditor is located in {instance}/sites/local/ckeditor and ckfinder is in {instance}/sites/all/modules/ckeditor/ckfinder per the installation instructors.
The problem I have is that when I try to browse to server I receive the message about multiple declarations of CheckAuthentication are not allowed. The message complains that I have a declaration within my ckeditor/ckfinder/config.php file and another in my ckeditor/includes/filemanager/config.php and yes there is a CheckAuthentication function contained within there. But its entirely and completely different in content.
So, when I comment out this function in the ckfinder/config.php that message goes away but when I try to use the file finder it then states that the file browser is disabled by default and to enable it add a CheckAuthentication function to the ckfinder/config.php file that returns a boolean true. So, these TWO messages are sort of "Microsoftee" ... conflicting useless messages.
So, if anyone has been able to properly install and configure this pair of editor tools would you please share where you installed them and where (which file) you enabled the CheckAuthentication function?
Inquiring minds want to know!!!
Thanks - B

Comments
Don't use the CKeditor module
Hi Bob,
Better a bit late than never, my advice is to punt.
My preference is to use project/wysiwyg.
Download and enable from http://drupal.org/project/wysiwyg.
Download CKEditor to your sites/all/libraries folder. Make sure you are using "CKEditor for Drupal" from http://ckeditor.com/download. (Alternatively, you can go with TinyMCE instead).
Disable the CKEditor module.
In the wysiwyg configuration, identify CKEditor as your editor. /admin/settings/wysiwyg
Configure your input formats, e.g. /admin/settings/wysiwyg/profile/1/edit
TEST!
If you’re happy, uninstall the CKEditor module.
Good luck!
Michael Brooks
Director Project Management & Development
SNP Technologies, Inc.
http://www.snp.com
Yeah I too use WYSIWYG and
Yeah I too use WYSIWYG and TinyMCE I found it to be more stable but am really trying to stay away from WYSIWYGs and move clients to markdown
edit
http://wiredcraft.com/blog/avoid-wysiwyg-editors
Advising him not to use
Advising him not to use CKEditor doesn't address the problem with CKFinder. Correct me if I'm wrong, but bobmct purchased CKFinder for about $60-$80 and can only use it with CKEditor. I found this post because I myself am in a similar predicament - not exactly the same. Sorry I can't offer a suggestion to your problem.
Ahh apologies to be honest I
Ahh apologies to be honest I missed CKFinder in the post. I've personally just had quite a few clients have a lot of problems with it.
On the topic of WYSIWYG I'm not sure how I missed the release of this as I've been waiting for a couple of years I think now but the Aloha Editor is out for D7
http://drupal.org/project/aloha