Comment 11 for bug 1073844

I encountered the same bug after importing a video stabilized with this command:

```
transcode -J stabilize -i art-01.mp4 -y null,null -o dummy
transcode -J transform -i art-01.mp4 -y xvid -o art-01-stable.mp4
```

Removing the clip didn't bring back my tracks but the preview is fine.