Distribution/Version: Ubuntu Hoary preview

Steps to reproduce:
1.  Rip a CD.
2.  By mistake, start ripping the same CD into the same folder in the same
    format.
3.  Realize your mistake, and click "Cancel".

What should happen:
*   You still have a complete version of every track.

What actually happens:
*   The complete file for the track you were in the middle of ripping is
    replaced by a partial file.

So, if there's a file in the same place as where you're ripping a track to, rip
to a temporary file instead, and replace the existing file with the temporary
file only once the track is finished.