I created the notebook on the My Site page in the Personal Documents library. But
I occassionally get sync errors when moving between locations like this:

This section contains changes that cannot be synced because access to the
section file is denied. correct the file permissions or save your copy of this section
elsewhere.

I have seen this error before, and I have seen it resolve itself, but tonight I decided
to try to find an explanation when it popped up at home. It appeared only one section
was causing the problem. This section appeared to be pointing to a valid sharepoint
location if i hovered over it in OneNote. So I decided to clear out any reference
to it on my laptop and just pull down the web copy. To do this, I closed OneNote and
then browsed to C:UsersusernameAppDataLocalMicrosoftOneNote12.0 and deleted
the file called OneNoteOfflineCache.onecache. I also moved the folder for the notebook
that existed in the backup folder. When I started OneNote again, I showed my notebook
with no sections, but as I synced every section appeared.

Obviously the danger here is that I could have made changes on the notebook at home
that had never synced with sharepoint. Deleting the offline cache in this scenario
would probably cause me to lose data, so if you follow my instructions, make sure
you have a backup of the notes.

I will continue to watch for the problem and post if I find any other answers.

InfoPath 2007 is an XML forms designer and editor package in the 2007
Microsoft^® Office system. Now in its third iteration (if you include InfoPath^® 2003
Service Pack 1), InfoPath has matured into a fully featured and integrated member
of the Office family. In this article, we give you a sneak peek at some of its highlights
and new features.

Source: InfoPath
2007: Designing Form Templates With The New Features Of InfoPath — MSDN Magazine,
August 2006