🚀 go-pugleaf

In GNU Emacs 19.26.1 (sparc-sun-sunos4.1.3, X toolkit) of Fri Sep  9 1994 on pisces

I've just installed emacs 19.26 after applying the patches in
emacs-19.25-19.26.diff to the old tree.  The configuration was
performed by: `./configure --prefix /usr/local/gnu --with-x-toolkit'.

The problem is in the selection of submenus entries.  The general
steps are:

Invoke emacs with `emacs -q'.  Press and hold the left mouse button
(LMB) over the `File' caption in the menu-bar.  Drag it down over the
`Bookmarks' caption, and then to the right so that a submenu appears.
Now, I just can't select any of its entries.  Even the box that
always surronds the entry over which the mouse is pointing in a
principal menu doesn't appear while dragging over the submenu.  When I
finally release the LMB over the submenu the message `menu-bar file t'
appears in the minibuffer.

This problem also occurred in emacs 19.25.

Since it's such a blatant error I'm guessing I've done something
wrong.  Any ideas?

Thanks,

Gustavo.