Domino 6.5.4 FP1
Well, since I loaded the Domino 6.5.4 FP1, I haven't had a mail server hang (yet...). It's been over two weeks - which is longer than prior uptime! I'm actually feeling pretty good about this one.
Sametime 6.5.1 FP1
Since loading ST 6.5.1 FP1 just over a week ago, I have still had a hang. As mentioned previously, this is a problem with my STMUX task just ending. From talking with Lotus Support again today, I was told that they are receiving more reports of this happening. Lotus is going to be sending me a debug hotfix that will have some more tracing code in it. Maybe we can find out what's happening.