Sudden keyboard layout changes

Wed Nov 18 10:51:42 UTC 2009

In F-10, F-11 and F-12, with a combination of GNOME, xterm, Emacs,
Firefox, Claws Mail, ...

... all of a sudden my keyboard input layout changes from QWERTZ to QWERTY
(or Germany to USA) and back again some time later. Inside Emacs, for
example, while editing some text. I can open new xterms, and they are
affected, too. A previously opened root xterm is not affected. Or not
always. Can't tell.

Do other people see this, too?
Is anyone aware of existing tickets that perhaps track this?