I also have experienced this problem. In addition to not being able to delete
it, I am unable to move it to another note book.
In a notebook I have a section group with two sub section groups. I have
moved all the sections to other notebooks. I would like to delete the section
group and two child section groups.
When I attempt to delete or move it returns to the original location.
There are several files within the section group's folders, as viewed from
explorer. I'm afraid to delete them there as some of the files are audio
files. My fear is that there may be links from the sections I moved to other
notebooks to these file. Anyone know if that is true. Any patches out there
to address this issue or a KB article. I haven't been able to find anything...