Thanks! I was suffering from tunnel vision and I missed the "history" action.
But now I'm seeing this...
- Click on History under the Actions column.
- [Optional] Click on a version.
- Click the Close button.
Result: get a "blank" Notebook page with no documents listed at all. Additional clicks on "Close" do nothing. I have to click the Notebook in the left pane to get back to the list of documents.
(Safari 3.2.1, Mac OS 10.4.11 PPC. Also with Firefox 3.0.8, same platform.)
EDIT: Found the bug report for this
Bug 33911 – Table of contents not shown after clicking close on document history