[GENERAL] Troubles with PL/pgSQL trigger/function drop/create scripts

I have a series of files containing DROP and CREATE commands for
PL/pgSQL functions and triggers that are failing intermittently when I
pipe them to psql (the backend just dies).  These are not syntax
problems; the scripts that fail in one try will succeed in the next.
And none of the functions are longer than 2400 chars.

Any clues?

Cheers,
Ed Loehr