I am currently having an issue running a Jessica application via VS2010 and Cassini. The code below is what I am running however when I attempt to use either PUT or DELETE verb
I'm pretty sure it's always been like that, the ASP.NET development server has its limits. I would recommend getting VS2010 SP1 and the IIS Express components through the Platform Web Installer. It will give you the same development experience without the quirks of Cassini.