I have recently installed Leapord on my mac book. I do not have a big external hard drive so I have set up time machine to just back up the documents folder. My question is that when time machine backs up it does not allow me to see the backups when I open the time machine program I just see gray windows. At first I thought it was because none of my files had changed so I went in and modified one of my word documents and let it back up. I still get the same result a bunch of gray windows and the first backup.