I think something is wrong, somewhere, with time machine. Time machine ran as usual, and 5 minutes later, I took my laptop from my dorm room to the library. I surfed the web a bit and wrote a lab report. The lab report (.pages) was the only newly created or modified file. I got back to my dorm and plugged in my external. I ran the TM backup manually just to backup my newly minted lab report. Time machine then proceeded to backup 1 GB of data before I stopped it. Why would it do that? What on earth is it backing up that was modified? My lab report surely takes up 248kb according to Finder... what gives?