Hello Mark Bourland,
You should set read/write permissions to the web.config for the user running aspnet working process, which is NETWORK SERVICES for IIS 6.x. and 7. Restart the IIS after that. We do not writing the web.config
to a temp file - we are just updating it. Probably the file C:\Program Files\telerik\Sitefinity3.6\WebSites\SitefinityEval\rsj1bded.tmp
' is created by .NET Framework.
the Telerik team