THANK YOU for your reply, Jason. (My client is anxious to have their site launched!)
I am attaching a zip file which contains the "admin/contenst_insert.php" page and the "contents_update.php" page... maybe you can open them and take a look at the code.
I already came across the posts that you suggested and tried those solutions over the past couple of days, but have not found a resolution.
If you don't see an obvious solution, maybe you could open a ticket, and I could pass along the password login to my Admin area...?