[bug] Execute pgScript Returns Error Without Executing The Query

I could not find this version is supported but it looks like serious bug.  
When executing query an pgScript used together pgScript returns an invalid  
error which it returned before.

Version: pgadmin3 1.12.3-1

Platform: Linux 3.0.0-14-generic #23-Ubuntu SMP Mon Nov 21 20:28:43 UTC  
2011 x86_64 x86_64 x86_64 GNU/Linux

PostgreSQL Server Version: PostgreSQL 9.1.2 on i686-pc-linux-gnu, compiled  
by gcc (Debian 4.6.1-15) 4.6.1, 32-bit	

How to reproduce:

* Open an SQL window
* Execute pgScript: Select true from ATable
* Execute query: Create table ATable (id int);
* Execute pgScript: Select true from ATable

[1] http://archives.postgresql.org/pgadmin-hackers/2009-03/msg00040.php