Hi all, I recently performed a clean install of SL and have had few problems so far. I deleted my old TM backups and started a new series; TM seems to work fine again. Actually, what disturbs me is that when my external HD is not connected, I keep getting this message "Time Machine could not complete the backup. The backup disk is not available" every hour or so. Not surprising on a portable computer, I would say. Is this an indication of a problem with my TM? In case this message is just a reminder to backup regularly: Is there any way to get rid of it? Cheers!