Needed to create a menu item linked to a folder on our SQL Server Reporting Services site. After putting the URL in my sitemap, I got error messages about a malformed URL even though I new the URL was good (I could copy and paste it into a web browser and get to the site). My URL was this:
http://gemini/Reports/Pages/Folder.aspx?ItemPath=%2fIT
Turns out the solution was simple. Just needed to replace the "%2f" with "/" and all was good.
http://gemini/Reports/Pages/Folder.aspx?ItemPath=/IT