Crazy PHP-> PostgreSQL errors

Warning: 11 is not a valid PostgreSQL result resource in
/usr/site/php/classes/db_pgsql.inc on line 62

Ok, this is a bit nasty.. All of the sudden I'm getting all kinds of the
above errors in my PHP code (code that's worked forever).. It happens on
both PG 7.0.2, 7.0.3 and 7.1 Beta 4 with both Apache 1.3.14 and 1.3.17..

It recently started happening on one of our production servers when it was
taken to PHP 4.0.4pl1 from 4.0.3. I'm not positive where it started
happening with my development server as the application effected hasn't been
worked on for a while..

Between my development server and our effected production server we're using
two totally different PgSQL classes for database access and both have been
stable for a long, long time so I'm pretty sure it's not out PHP code...

It doesn't appear that the backend is crashing.. I get no message that it
exited abnormally, I swear it's like I'm calling pg_close() somewhere (but
I'm not)..

I'm at a loss as to how to debug this, it _appears_ to be PHP 4.0.4pl1
that's doing something crazy but I'll be damned if I can see what it is..
Before it was limited to my development server but after going to PHP
4.0.4pl1 on a production server this started to show up everywhere..

Any ideas/comments/insights would be appreciated!

-Mitch