You may have experienced it before. You set up and configure a MOSS 2007 site for anonymous access, but an anonymous user can’t add an item to a list. You click save in the list’s anonymous access permissions settings but no matter how many times you do it, the “Add Items” permission for Anonymous Access won’t take.
If you experience this, check your Policy for Web Application settings in the Central Administration. Make sure there is not a Deny policy on the web application where you see the issue.
Recently, while working on a few new web parts, I encountered an issue with adding these web parts to a page. I started getting the following error: A potentially dangerous Request.Form value was detected from the client (ctl00$PlaceHolder1$ctl00$ctl00$RichHtmlField="<P align=center> <P..."). I tried removing other web parts and content from the page but it resulted in the same error message pointing to a different control. It turns out that while working on getting the .NET 3.5 working with MOSS 2007, I lost a section of the web.config: ...