Memory leak when using QMessageBox

int main(int argc, char *argv[])
{
    //Enable memory leak detection
    int tmp = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
    tmp |= _CRTDBG_LEAK_CHECK_DF;
    _CrtSetDbgFlag(tmp);

    QApplication app(argc, argv);
    QMessageBox::aboutQt(NULL);

    return 0;
}

Detected memory leaks!
Dumping objects ->
{1710} normal block at 0x01FC7758, 1024 bytes long.
 Data: <            jw  > 01 00 00 00 F6 01 00 00 DA 01 00 00 6A 77 FC 01 
{1622} normal block at 0x01FC51B8, 4 bytes long.
 Data: <Xw  > 58 77 FC 01 
Object dump complete.

---------- Block 1710 at 0x0208AE48: 1024 bytes ----------
  Call Stack:
    0x6703EB6D (File and line number not available): qMalloc
    0x670A1BAF (File and line number not available): QString::realloc
    0x670A1B28 (File and line number not available): QString::resize
    0x670AAF59 (File and line number not available): replaceArgEscapes
    0x670AACA2 (File and line number not available): QString::arg
    0x655F3622 (File and line number not available): QMessageBoxPrivate::retranslateStrings
    0x655F0B2F (File and line number not available): QMessageBoxPrivate::init
    0x655F1460 (File and line number not available): QMessageBox::QMessageBox
    0x655F2D72 (File and line number not available): QMessageBox::aboutQt



---------- Block 1622 at 0x02085C68: 4 bytes ----------
  Call Stack:
    0x655F06D7 (File and line number not available): QMessageBoxPrivate::init
    0x655F1460 (File and line number not available): QMessageBox::QMessageBox
    0x655F2D72 (File and line number not available): QMessageBox::aboutQt