Loaded Lion on 2010 Macbook Air yesterday. Prior to the install, I had 50 gig of free space left. After the install I had 51.04 gig. Noticed last night before I went to bed that it said I had 46 gig of free space. All I had open during the day were Safari, Chrome, iTunes, and Mail. This afternoon I restarted the Air and I'm once again at 51.04 gig of HD space. Any idea what would cause 5 gig of the HD to get eaten up in a day's time?