Stalled post to pgsql-general

Hello:
First of all, forgive me if this is not the appropiate list
for my problem.

What happens is: 6.5.0 running whitout problem for a very
long time. Suddenly:

select * from aliases where alias ~'claudia.gonzalez' \g
alias |receptores
----------------+----------
claudia.gonzalez|claudia
(1 row)

BUT:

select * from aliases where alias ='claudia.gonzalez' \g
alias|receptores
-----+----------
(0 rows)

Also:

select * from aliases where alias~'^claudia.gonzalez$' \g
alias|receptores
-----+----------
(0 rows)

select * from aliases where alias~'claudia.gonzalez$' \g
alias |receptores
----------------+----------
claudia.gonzalez|claudia
(1 row)

Seems like there is some kind of unvisible char at the front.

Any ideas? TIA!

Fernando P. Schapachnik
Administración de la red
VIA NET.WORKS ARGENTINA S.A.
fschapachnik(at)vianetworks(dot)com(dot)ar