One of the improved features in Vista is the Offline File Sync system; it's a great way to painlessly keep files on your laptop and desktop the same. However Vista's Sync setup doesn't play nicely with SVS and it's not recommended you used Synchronized offline files with SVS for a few reasons:

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Read more at: http://juice.altiris.com/tip/3609/vista-synchronized-offline-files-and-svs