Mid FC6 install when at the - "Office & Productivity", "Software Development" or "Web server" stage. If one selects extra repositories, defaults to "Fedora Extras" and there is no network connection present on eth0 or other network port (not tested, only tested with eth0) the anaconda installer crashes. Should degrade more gracefully. Informing the user there is no connection present, and should check physical connection. Reproducible: Always.
*** This bug has been marked as a duplicate of 212018 ***