Comment 8 for bug 260589

(In reply to comment #3)
> (In reply to comment #2)
> > Let's see if GTK+ is interfering here.
> >
> > Can you try
> >
> > export GTK_IM_MODULE=xim
> > gedit
> >
> > and check if the Congo layout works now in gedit?
> >
>
> export GTK_IM_MODULE=xim does fix it.
> So it's a Gtk+ bug?
>

A change that took place, and I believe it relates to this bug, is at
http://svn.gnome.org/viewvc/gtk%2B/trunk/gtk/gtkimcontextsimple.c?view=annotate
lines 928-932.

The order of check_algorithmically() and check_compact_table() changed (check_algorithmically() was put first recently), so that issues with the compose table mess are silently bypassed.