Ive got a nice restful service going on (yay openrasta), works well in IIS6 but is giving me default error messages in IIS 7. To turn it off add the following to web.config:

   <system.webServer>        <httpErrors existingResponse="PassThrough" />    </system.webServer>

All happy again! I need to look into what other options there are for this setting but it gets me out of a fix for the time being