BUG #2372: dblink_exec doesn't return. NEVER!

The following bug has been logged online:

Bug reference:      2372
Logged by:          William Leite Araújo
Email address:      william.bh@gmail.com
PostgreSQL version: 8.0.7
Operating system:   i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.3.5
(Debian 1:3.3.5-13)
Description:        dblink_exec doesn't return. NEVER!
Details:

A trigger start a dblink_exec local connection to insert on a table "A" as
SuperUser. Table "A" fires insert trigger that, by LOG messages, ends, but
the function never return to initial trigger.
   UPDATE TRIGGER T call dblink_exec to INSERT
     REMOTE INSERT fire TRIGGER that ends, but bdlink_exec doesn't return on
trigger.