This is definitely not a unique problem but I have yet to see a solid solution. I have over 11k songs in my library and am buying new music all the time. How in the world do I get the Media Center Extender (XBox 360) to resyncronize with my Media Center PC so that the changes made to main library are reflected on the extender (XBox 360)??? Without having to delete the library on the extender (XBox 360) and rebuilding it... That takes hours and the initial sync was run over night... Can I just "Add Music" via the XBox 360 and have it detect changes made to the PC end library??? I've tried this with no luck... WM11 should have a "resync" option that compares itself with the extender and pushes library changes to the extender without having to rebuild the entire library... Is this a problem that exists on the Windows Vista or Windows 7 version? That would be a primary reason for upgrading... Brett