Hi. New problem, with an easymail installation that has been working great 'til now.
Set up a newsletter to go out to 5 lists - total of about 5200 recipients. Added recipients, and sent. After about 5 minutes, went back to the newsletters page, and the total recipients number dropped from 5200 to 695 - closer inspection of the report showed that only the first list got added. This has never happened before.