Set Transcation Isolation level bug

Your name		:	Alois Maier
Your email address	:	almaier@yahoo.com


System Configuration
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Architecture (example: Intel Pentium)  	:   Intel Pentium  	
Operating System (example: Linux 2.0.26 ELF) 	:   Linux 2.0.36 ELF
PostgreSQL version (example: PostgreSQL-6.5.1):   PostgreSQL-6.5.1
Compiler used (example:  gcc 2.8.0)		:   egcs-2.91.66

Please enter a FULL description of your problem:
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SET TRANSACTION ISOLATION LEVEL SERIALIZABLE  does not set the transaction
isolation level to erializable.


Please describe a way to repeat the problem.   Please try to provide a concise
reproducible example, if at all possible:
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test=> SHOW TRANSACTION ISOLATION LEVEL;
NOTICE:  TRANSACTION ISOLATION LEVEL is READ COMMITTED
SHOW VARIABLE
test=> SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
SET VARIABLE
test=> SHOW TRANSACTION ISOLATION LEVEL;
NOTICE:  TRANSACTION ISOLATION LEVEL is READ COMMITTED
SHOW VARIABLE


If you know how this problem might be fixed, list the solution below:
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