You receive an authentication prompt and error when trying to Write an Article in the Knowledge Base application template for WSS 3.0 and MOSS 2007 over an SSL HTTPS:// connection
Problem: You use an SSL/HTTPS secure connection with your SharePoint site and have created a site using the Knowledge Base application template. When you click on the link to "Write an Article" you receive an authentication prompt or Access Denied error.
Background: The Knowledge Base application template was not QA'd against an SSL or secure HTTPS sessions – there are absolute paths to HTTP content referenced therefore Internet Explorer senses a domain change and throws a warning or authentication prompt depending on your configuration.
Solution: The best solution is to use the Knowledge Base application template with an HTTP connection. This eliminates the authentication prompt and allows you to save the new knowledge base article that you are trying to create