Vaccuuming every db in cluster fails to eliminate "execute a full-database VACUUM in..."

So, I have neglected to do the vacuum on every db for a long time, and
this is a very high volume cluster.  The db stopped executing requests
this morning, and reported:

ERROR:  database is not accepting commands to avoid wraparound data
loss in database "vwuds"

So, I did some googling and found I needed to shut down the
postmaster, enter single user mode, and vacuum each and every db in my
cluster.  I did so (even though only about 4 of the 22 databases
actually get any appreciable use), but am still hampered by this
error.

Using 8.3.7 on CentOS.  I am really in a bind, obviously, as my system
is currently unusable (for what I do with it that is).

Thanks in advance,
r.b.


--
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Robert W. Burgholzer
http://www.findingfreestyle.com/