Gnome makes application crash

[regix]

Hi,

I have made a qt application. It works fine in KDE. The problem I'm having is that in Gnome the application terminates each time the user uses an inputdialog or a colordialog.
Is there something I can do to prevent the application from terminating in Gnome.
As I said in KDE the application behaves correctly.
some examplecode where the program stops in Gnome:

void EditCSSDlg::changeTitleColor()
{
    QColor changed = QColorDialog::getColor(Qt::white);
    QPixmap colpixmap(30,30);
    colpixmap.fill(changed);
    this->pushButtonColor->setPixmap(colpixmap);
    this->titlecolor = changed.name();    
}

void EditCSSDlg::changeTitleColor()
{
    QColor changed = QColorDialog::getColor(Qt::white);
    QPixmap colpixmap(30,30);
    colpixmap.fill(changed);
    this->pushButtonColor->setPixmap(colpixmap);
    this->titlecolor = changed.name();    
}

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the application never gets to the instantiation of the QPixmap.

regix