Problem with datatype REAL using the = (EQUAL) operator

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POSTGRESQL BUG REPORT TEMPLATE
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Your name : Javier Carlos Rivera
Your email address : fjcarlos ( at ) correo ( dot ) insp ( dot ) mx

System Configuration
----------------------
Architecture (example: Intel Pentium) : Intel Pentium 4

Operating System (example: Linux 2.0.26 ELF) : Debian GNU/Linux 3.0
2.4.23

RAM : 256 MB

PostgreSQL version (example: PostgreSQL-6.3.2) : PostgreSQL-7.4.1

Compiler used (example: gcc 2.7.2) : 2.95.4

Please enter a FULL description of your problem:
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When I make a select and in the WHERE section I use the = (EQUAL)
operator whith a column of real datatype the results of the query is 0
rows even if there exist rows that match the condition.

Please describe a way to repeat the problem. Please try to provide a
concise reproducible example, if at all possible:
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bd_temporal=> CREATE TABLE tbl_temp (var real);
bd_temporal=> \d tbl_temp
Table "public.tbl_temp"
Column | Type | Modifiers
--------+------+-----------
var | real |

bd_temporal=> INSERT INTO tbl_temp VALUES(0.1);
bd_temporal=> INSERT INTO tbl_temp VALUES(0.11);
bd_temporal=> INSERT INTO tbl_temp VALUES(0.20);
bd_temporal=> INSERT INTO tbl_temp VALUES(0.25);
bd_temporal=> INSERT INTO tbl_temp VALUES(0.26);

bd_temporal=> SELECT * FROM tbl_temp WHERE var < 0.20;
var
------
0.1
0.11
(2 rows)
bd_temporal=> SELECT * FROM tbl_temp WHERE var = 0.11;
var
-----
(0 rows)
bd_temporal=> SELECT * FROM tbl_temp WHERE var = '0.11';
var
------
0.11
(1 row)

If you know how this problem might be fixed, list the solution below:
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For now I have to put between '' the value as I was working whith CHARs
values.
The weird thing is that with all the other comparison operator all works
well, only the = (EQUAL) operator makes things suchs as this:

bd_temporal=> SELECT * FROM tbl_temp WHERE var = 0.25;
var
------
0.25
(1 row)

bd_temporal=> SELECT * FROM tbl_temp WHERE var = 0.26;
var
-----
(0 rows)

bd_temporal=> SELECT * FROM tbl_temp WHERE var = '0.25';
var
------
0.25
(1 row)

bd_temporal=> SELECT * FROM tbl_temp WHERE var = '0.26';
var
------
0.26
(1 row)

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