Warning 1 Error updating JScript IntelliSense: C:\MvcApplication1\MvcApplication1\Scripts\jquery-1.4.1-vsdoc.js: Object doesn’t support this property or method @ 1108:1
I did a quick search, but that didn’t turn much up. Eventually, I ended up grabbing the jquery-1.4.1-vsdoc.js file from http://docs.jquery.com/Downloading_jQuery. I dropped this over the top of the existing one in my project, refreshed IntelliSense again and … it worked!
As always, your mileage may vary 🙂
UPDATE: This is a known issue and is fixed for RTM.