To reproduce:

1. create a table
2. in one of the cells, add a few bullets.
3. get your cursor at the end of the first bullet and keep hitting CMD+Backspace/Delete (or Shift + Home then Delete/Backspace on Windows)

Expected result: It will delete every word in the row and eventually delete the bullet and the entire row, moving the rows below it up one line
Actual result: It deletes the bullet but not the entire row.

The end result is that you can never delete that first row.

See the video here http://screencast.com/t/FqkvqLFQsnaZ

It seems to be caused by this moz-dirty element?