any SELECT statement in the 'psql' console returns 'SELECT'

Hi,

It fact, I wrote on newsgroup yesterday about a problem that seemed to come
from "libqp.dll", but it wasn't.

It looks like something going wrong at the server-side (version 7.3.4-2 on
Cygwin 1.5.1) when sending the result of a query.

When I call a function from 'psql' (or 'libpq'), the client returns
"SELECT " (instead of a number)
and here is the client trace:
To backend> Q
To backend> SELECT news_stockIDtoMDS(10)
From backend> C
From backend> "SELECT"
From backend> Z
From backend> Z

When I write a SELECT statement under 'psql' (either in '/usr/bin" or compiled as 'psql.exe' with VC++) ,
the console displays "SELECT ", and here is the trace at the server side:
LOG: plan:
{ SEQSCAN :startup_cost 0.00 :total_cost 20.00 :rows 1000 :width 346
:qptargetlist ({ TARGETENTRY :resdom { RESDOM :resno 1 :restype 23 :restypmod
-1 :resname _id :reskey 0 :reskeyop 0 :ressortgroupref 0 :resjunk false }
:expr { VAR :varno 1 :varattno 1 :vartype 23 :vartypmod -1 :varlevelsup 0
:varnoold 1 :varoattno 1}} { TARGETENTRY :resdom { RESDOM :resno 2 :restype
1043 :restypmod 36 :resname _mds_code :reskey 0 :reskeyop 0 :ressortgroupref 0
:resjunk false } :expr { VAR :varno 1 :varattno 2 :vartype 1043 :vartypmod 36
:varlevelsup 0 :varnoold 1 :varoattno 2}} { TARGETENTRY :resdom { RESDOM
:resno 3 :restype 1043 :restypmod 36 :resname _ric :reskey 0 :reskeyop 0
:ressortgroupref 0 :resjunk false } :expr { VAR :varno 1 :varattno 3 :vartype
1043 :vartypmod 36 :varlevelsup 0 :varnoold 1 :varoattno 3}} { TARGETENTRY
:resdom { RESDOM :resno 4 :restype 1043 :restypmod 36 :resname _isin :reskey 0
:reskeyop 0 :ressortgroupref 0 :resjunk false } :expr { VAR :varno 1 :varattno
4 :vartype 1043 :vartypmod 36 :varlevelsup 0 :varnoold 1 :varoattno 4}} {
TARGETENTRY :resdom { RESDOM :resno 5 :restype 1043 :restypmod 36 :resname
_bloomberg :reskey 0 :reskeyop 0 :ressortgroupref 0 :resjunk false } :expr {
VAR :varno 1 :varattno 5 :vartype 1043 :vartypmod 36 :varlevelsup 0 :varnoold
1 :varoattno 5}} { TARGETENTRY :resdom { RESDOM :resno 6 :restype 1043
:restypmod 260 :resname _name :reskey 0 :reskeyop 0 :ressortgroupref 0
:resjunk false } :expr { VAR :varno 1 :varattno 6 :vartype 1043 :vartypmod 260
:varlevelsup 0 :varnoold 1 :varoattno 6}} { TARGETENTRY :resdom { RESDOM
:resno 7 :restype 1043 :restypmod 68 :resname _sector :reskey 0 :reskeyop 0
:ressortgroupref 0 :resjunk false } :expr { VAR :varno 1 :varattno 7 :vartype
1043 :vartypmod 68 :varlevelsup 0 :varnoold 1 :varoattno 7}} { TARGETENTRY
:resdom { RESDOM :resno 8 :restype 1043 :restypmod 6 :resname _country :reskey
0 :reskeyop 0 :ressortgroupref 0 :resjunk false } :expr { VAR :varno 1
:varattno 8 :vartype 1043 :vartypmod 6 :varlevelsup 0 :varnoold 1 :varoattno
8}} { TARGETENTRY :resdom { RESDOM :resno 9 :restype 23 :restypmod -1 :resname
_has_parent :reskey 0 :reskeyop 0 :ressortgroupref 0 :resjunk false } :expr {
VAR :varno 1 :varattno 9 :vartype 23 :vartypmod -1 :varlevelsup 0 :varnoold 1
:varoattno 9}}) :qpqual <> :lefttree <> :righttree <> :extprm () :locprm ()
:initplan <> :nprm 0 :scanrelid 1 }

SEQSCAN :c=0.00..20.00 :r=1000 :w=346 ( stock_mapping )

The server has found 346 records, so why doesn't it work properly?
Before passing to 'ipc-daemon2.exe', it was working well.

Note: I installed Cygwin + PostgreSQL without having logged as an administrator,
updating an older version that was installed as administrator. But the server
encounters no problem to start.

Thanks for any help,

Cedric

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