Formatted my MacBook Pro and clean installed Snow Leopard after I lost connectivity to any external monitor I plug in to my MBP. I noticed that as soon as I restarted with the Snow Leopard DVD, I regained the connection with my external monitor. After format all was well until I updated all to the way it was. No problems showed until I loaded the recent update of Snow Leopard. Does anyone suffer from this? Does anyone know a solution? I am starting to see isolated posts in the internet from desperate people.