To reproduce

• Insert the following text as a wiki markup block:

* foo
** bar
** boz
** aaa
* frob

• Use the mouse to select "aaa" and then press the delete key to remove it. The results should be as shown in "bullet1.png".
• Click the pointer in front of the word "bar".
• Press <Shift-Down>
• Press <Shift-Down>
• Press <Shift-Right>. The results should now be as shown in "bullet2.png".
• Click the "left indent" button.

The rather confused results are shown in bullet3.png. Bar and boz have been correctly unindented, but the empty bullet remains with its original indentation. Additionally, the "frob" has had its bullet removed and been pushed to a new line.

(The expected results were to simply unindent the three lines that were highlighted in bullet2.png.)