Delete w/ regexp

   On one of our tables, this works fine:

select * from images where path ~* 'packages/site_system';

  However, this:

delete from images where path ~* 'packages/site_system';

  will make it work for a second or two, then give:

pqReadData() -- backend closed the channel unexpectedly.
        This probably means the backend terminated abnormally
        before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.

   This is with Postgres 7.0.2.  Any ideas what's going on?

steve