Thread: pqReadData Error

We're having a number of problems with 7.0.3

Database error: Invalid SQL: BEGIN;
PostgreSQL Error: 1 (pqReadData() -- backend closed the channel
unexpectedly. This probably means the backend terminated abnormally before
or while processing the request. )
Session halted.

What does  this mean? What action should be taken?

Please forgive my relative lack of knowledge regarding pgsql. I am
relatively new to this db.

Matt Friedman