On Fri, 19 Oct 2018 15:44:21 +0100 (BST) Vivek Dasmohapatra <vivek@etla.org> wrote:

>> There are a couple of visual oddities: when the `menu-bar-scrollbar'
>> frame parameter has the value nil or `forced-resize' (or when the item
>
> Could you grab screenshots (just the rectangle around the glitch will
> suffice - don't need the whole X window or screen)?
>
> Makes it easier to compare/debug/etc.

Here's a screenshot showing the the menu and tool bars in Emacs without
your patches (left), with patches and menu-bar-scrollbar set to
`automatic' (middle) and set to nil (right):