Switching windows while typeout is displayed in the editor makes the blinkers funny

[MOON at SCRC-TENEX]

This is due to fundamental conceptual errors in the way selection works.
This is one of the things (perhaps the main thing) that will be fixed by
the new "activity system" that HIC is going to find the time to work on
one of these months.  In the meantime there isn't a reasonable way to fix it.
The problem is basically that switching programs (e.g. between the editor
and zmail) is all mixed up internally with switch windows (e.g. between the
normal editor window, the editor typeout window (e.g. Apropos output),
and the editor mini-buffer).