FM-12.0.4.445 Online Help is sowmewhat screwed up:
The top of the text overlaps with the heading stuff.
If you close the left TOC pane with the left pointing triangle in the middle of the hight, ther is no means to get the TOC pane back:
I need to close the help application. At the next start (and suficient width) the left TOC pane is available again.