getty keeps dying

[Max Southall]

>Randomly, about once or twice a week on different machines they will 
>get the message from /etc/init:
>
>/dev/tty01: getty keeps dying - there may be a problem
>
Yup, see it all the time, randomly.
Happens once or twice a day.
And it's on nonexistent ports most of the time, too!
When it's a real port, it disables it ... very annoying.
This is just with a couple of external ports for dial-in - no custom
software!
The version I have is Xenix 286 2.2.3 ...