After it processed the last work unit, my Linux version of setiathome
exited with the message "can't open file stop_after_send.txt" and
refused to continue when restarted.  I deleted all of the sah files
and logged into the system again, but without any resolution of the
error message.  If a file by that name is created, the client exits
and does nothing, as one would expect.  If a file by that name is not
present, then the error message is issued and setiathome exits anyway.
<mumble>

Has (1) seti@home terminated its activities, (2) do I need to upgrade
the client, or (3) is it some kind of weird server problem?