I use lists a lot (I'm moving all my stuff from Ta-Da lists
and Backpack to Buzzword documents).
Sometimes when I create lists inside Buzzword and more often
when I past a bulleted list or a set of lines into a bulleted line
(so they inherit the list format), I find that I cannot un-bullet a
line from the middle of the pack. The list radio button is
selected, but disabled.
Sometime (not all the time), I can use the New List radio
button to "break" the format, and then un-bullet the line (which is
now the first line of the new list).
I change formats and indentations a lot, so level 0 testing
is not going to catch this. Perhaps a code-review with emphasis on
left-over codes and positioning and pasting text that other systems
think is bulleted would be productive.