But why did it have to leave in the first place! I store my e-mail on a USB stick, for compatibility reasons I left the filesystem fat32. This seems to now be a mistake. Somehow the filesystem got a bit corrupted; maybe I pulled the stick out in the middle of a write; but I doubt it. So compatibility be darned, I think I'm going to change it to ext3.
For those of you who didn't know; Gretchen, Kate, Dad, Austin and I went on a backpacking trip through the Grand Canyon. It went very well. Pictures to come soon.