Can't recompile qodbc-driver, recompilation fails on qsql_odbc.cpp, QStringBuilder has no member named 'simplified'

Can't recompile qodbc-driver. In file drivers\odbc\qsql_odbc.cpp, string 264; 270 there is error: call to simpliied() function, but class QStringBuilder<QStringBuilder<QString, QLatin1Char>, QString> has no such member.

code string:

return (qWarnODBCHandle(SQL_HANDLE_ENV, odbc->dpEnv()) + QLatin1Char(' ')
+ qWarnODBCHandle(SQL_HANDLE_DBC, odbc->dpDbc()) + QLatin1Char(' ')
+ qWarnODBCHandle(SQL_HANDLE_STMT, odbc->hStmt, nativeCode)).simplified();

<...>

return (qWarnODBCHandle(SQL_HANDLE_ENV, odbc->hEnv) + QLatin1Char(' ')
+ qWarnODBCHandle(SQL_HANDLE_DBC, odbc->hDbc, nativeCode)).simplified();

Affected: Qt 4.7.0-Beta1
4.6.0, 4.6.1: no call "simplified()" in.

Qt compile configuration:
-opensource -debug-and-release -developer-build -qt-sql-odbc -no-qt3support -qt-sql-psql -I D:/Qt/PostgreSQL/8.4/include -L D:/Qt/PostgreSQL/8.4/lib -l libpq

Compile error messages:

drivers\odbc\qsql_odbc.cpp: In function 'QString qODBCWarn(const QODBCPrivate*,
int*)':
drivers\odbc\qsql_odbc.cpp:264: error: 'class QStringBuilder<QStringBuilder<QStr
ingBuilder<QStringBuilder<QString, QLatin1Char>, QString>, QLatin1Char>, QString
>' has no member named 'simplified'
drivers\odbc\qsql_odbc.cpp: In function 'QString qODBCWarn(const QODBCDriverPriv
ate*, int*)':
drivers\odbc\qsql_odbc.cpp:270: error: 'class QStringBuilder<QStringBuilder<QStr
ing, QLatin1Char>, QString>' has no member named 'simplified'
drivers\odbc\qsql_odbc.cpp: In function 'QString qGetStringData(void*, int, int,
bool)':