Thanks to both of you for being so diligent and getting this info to me. Since I'm unable to get the result myself I think it may be a good idea to see if updating the FCK editor source files will help with this. I don't think you would be able to update the files to the newer CKeditor files though as this new version works differently in many regards.
Here is a link to a thread that discusses replacing these source files so that you try the latest release files to see if the problem occurs there as well.
Please post back and let us know the result, and thanks again for sticking in there with me while we investigate this issue.