Just noticed what appears to be a bug in the Documentation Wiki.
On a page with the Contents "box" displayed, the very last item of the Contents can be partly or entirely overlaid by the first "title", as shown in the example below:
The consequence is that, when hovering the mouse over that last item in the Contents box, e.g. here item 5, most of the link is overlaid by Title 1 "Select a category", and you can only click the link starting at "estion banks".
In some cases, this can be worse, if, e.g. the first item is longer than the last, the link to the last item will not be clickable at all.