BUG #8210: UTF8 column names corrupted by server

The following bug has been logged on the website:

Bug reference:      8210
Logged by:          Martin Schaefer
Email address:      martin.schaefer@cadcorp.com
PostgreSQL version: 9.2.1
Operating system:   Windows 8
Description:        =


The following code:

    const wchar_t *strName =3D L"id_=C3=A4=C3=9F";
    wstring strCreate =3D wstring(L"create table test_umlaut(") + strName +=
 L"
integer primary key)";

    PGconn *pConn =3D PQsetdbLogin("", "", NULL, NULL, "dev503", "postgres",
"******");
    if (!pConn) FAIL;
    if (PQsetClientEncoding(pConn, "UTF-8")) FAIL;

    PGresult *pResult =3D PQexec(pConn, "drop table test_umlaut");
    if (pResult) PQclear(pResult);

    pResult =3D PQexec(pConn, ToUtf8(strCreate.c_str()).c_str());
    if (pResult) PQclear(pResult);

    pResult =3D PQexec(pConn, "select * from test_umlaut");
    if (!pResult) FAIL;
    if (PQresultStatus(pResult)!=3DPGRES_TUPLES_OK) FAIL;
    if (PQnfields(pResult)!=3D1) FAIL;
    const char *fName =3D PQfname(pResult,0);

    ShowW("Name:     ", strName);
    ShowA("in UTF8:  ", ToUtf8(strName).c_str());
    ShowA("from DB:  ", fName);
    ShowW("in UTF16: ", ToWide(fName).c_str());

    PQclear(pResult);
    PQreset(pConn);

(ShowA/W call OutputDebugStringA/W, and ToUtf8/ToWide use
WideCharToMultiByte/MultiByteToWideChar with CP_UTF8.)

generates this output:

Name:     id_=C3=A4=C3=9F
in UTF8:  id_=C3=83=C2=A4=C3=83=C5=B8
from DB:  id_=C3=A3=C2=A4=C3=A3=C3=BF
in UTF16: id_???

The back-end treats the name as if it were in ANSI encoding, not in UTF-8,
when it lower-cases the name. The resulting column name is corrupted.

I=E2=80=99m using PostgreSQL 9.2.1, compiled by Visual C++ build 1600, 64-b=
it

The database uses:
ENCODING =3D 'UTF8'
LC_COLLATE =3D 'English_United Kingdom.1252'
LC_CTYPE =3D 'English_United Kingdom.1252'