Running on a powerbook g4 with 256 MB RAM.
Latest darwin with Windowmaker as window manager and
root less display (which works fine).
Occasionally an xterm window seems to be unable to
become active, even if clicking the titlebar. It is no
longer possible to enter text in the xterm window.
I choose 'kill' from the windowmaker menu to remove it.
Only observed for xterm, but that may be because I
mostly use xterm.