* etc/PROBLEMS: Document an IBus emoji panel problem.
the one coming with KDE 3.3 or later might solve the problem; if it
doesn't, set 'select-active-regions' to 'only' or nil.
+*** Emacs doesn't receive the key "C-.", displaying an input field instead.
+
+This is caused by the IBus Emoji input panel, which is usually bound
+to "C-.". You can disable that panel by running the following
+command:
+
+ $ gsettings set org.freedesktop.ibus.panel.emoji hotkey "[]"
+
+
** Window-manager and toolkit-related problems
*** Emacs built with GTK+ toolkit produces corrupted display on HiDPI screen