[Cleaning up old mail here...]
This sounds a lot like the bug that occurs if your machine happens to have
any arps in its table that it updates during the approximately 2 minutes
surrounding the time that the millisecond clock turns over and is still
representable as a smallp. This happens every 49.7 days; the last two
times have been 30-Apr-89 19:09:35 EDT and 19-Jun-89 12:12:23 EDT.
Clearing \AR.IP.TO.10MB.ALIST is a slightly less drastic remedy than
I believe this bug was fixed in Medley 1.1, if not sooner.