QFileDialog prevents app from closing

[hersheyzombie]

A bizarre twist: I found that the problem goes away if I remove from the project a small file for converting between QImages and IPLImages (used in OpenCV)

The file, which i found online, does not do anything that seems like it should be relevant to QFileDialog, here is the header:

#ifndef QTIPL_H
#define QTIPL_H
#include <QImage>
#include <highgui.h>
 
IplImage qtToCv(QImage* qImage);
QImage cvToQt(IplImage* iplImage);
 
#endif // QTIPL_H

#ifndef QTIPL_H
#define QTIPL_H
#include <QImage>
#include <highgui.h>

IplImage qtToCv(QImage* qImage);
QImage cvToQt(IplImage* iplImage);

#endif // QTIPL_H

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and cpp:

#include "qtIPL.h"
 
IplImage qtToCv(QImage* qImage)
{
        IplImage* cvImage;
        cvImage = cvCreateImageHeader(cvSize(qImage->width(), qImage->height()), IPL_DEPTH_8U, 4);
        cvImage->imageData = (char*)qImage->bits();
        IplImage* colorImage = cvCreateImage( cvGetSize(cvImage), 8, 3 );
        cvConvertImage( cvImage, colorImage, 0 );
 
        return *colorImage;
}
 
QImage cvToQt(IplImage* iplImage)
{
        if(!cvSaveImage("tmpImg.bmp", iplImage)) printf("Could not save: tmpImg.bmp in cvToQt");
        QImage img("tmpImg.bmp");
}

#include "qtIPL.h"

IplImage qtToCv(QImage* qImage)
{
        IplImage* cvImage;
        cvImage = cvCreateImageHeader(cvSize(qImage->width(), qImage->height()), IPL_DEPTH_8U, 4);
        cvImage->imageData = (char*)qImage->bits();
        IplImage* colorImage = cvCreateImage( cvGetSize(cvImage), 8, 3 );
        cvConvertImage( cvImage, colorImage, 0 );

        return *colorImage;
}

QImage cvToQt(IplImage* iplImage)
{
        if(!cvSaveImage("tmpImg.bmp", iplImage)) printf("Could not save: tmpImg.bmp in cvToQt");
        QImage img("tmpImg.bmp");
}

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if anyone sees something wrong with this (or can recommend a similar way to convert between these two image formats) please let me know