Comment 18 for bug 415101

Like the upstream Emacs bug alleges, I can confirm that this also affects the Buffers menu. I also discovered that tearing off the Buffers menu and switching to another buffer is a workaround -- it will cause not only the Buffers menu, but also the C menu to finally update.

Tearing off the Tools menu would sometimes, but not always, also work as a workaround. Tearing off other menus did not help. I speculate that the Tools menu is also partially dynamic, and that I did something to cause it to be updated when I did see that tearing it off caused the C and Buffers menus to be brought up to date.

I have still been unable to reproduce on Jaunty. I tried with the jaunty-proposed repository enabled, and finally both jaunty-proposed and jaunty-backports, and it still did not repro. I am speculating that mortajfrondoj did not have a vanilla Jaunty (Ubuntu 9.04) system.

Furthermore, since Karmic (I used 9.10 alpha 4) has the same version of emacs22 as Jaunty, it does seem that the root cause is in some GTK component which has changed between Jaunty (Gnome 2.26) and Karmic (2.28?). In any event, Emacs should work regardless of the GTK version, so perhaps it would still make sense to try to fix the problem in Emacs.