It seems to me that openwindows apps like clock manipulate the X keyboard. E.g.
after starting clock the list of modifiers changes.
This is especially disturbing if one uses Xemacs from a PC. It doesn't have a
Meta_L key, but clock sets mod3 to point there. As a consequence one cannot enter
the standard M-x by pressing Alt-x.
Maybe thats a related problem, I too have problemse using the Compose key (i.e.
Multi_key). If used within an xterm, Compose-a-a should lit the Compse's LED and
if I use DEC's dxterm instead (using Xsun as $DISPLAY), everything works fine