A large project of mine consists of a number of web applications. So far everything was tied together with a regular webpage index.htm. As some asp.net functionality was needed there as well it had to become a default.aspx. Firing up the new web project wizard I had forgotten all about the web.config, with all the (many) shared app settings, in the directory. VS hadn't. Politely it asked if it should overwrite the existing web.config. No thank you. This saved me from looking for the backup. Nice feature.
Peter