Jan Wieck wrote:

> NULL = NULL yields NULL, not true. You have to query
>
>     WHERE "ID" IS NULL
>
>
Ah :)

laterooms=# update "RoomNight" set "Cancelled" = 'f' WHERE "ID" IS NULL;
UPDATE 0

and no segfault...

I'll give a REINDEX a blast tonight as Andrew Sullivan's suggested - 
hopefully that will reveal something strange, since we've been running 
with Slony for a couple of weeks now fault-free - certainly longer than 
the segfaults have been happening.

Cheers,
Gavin.