The following very simple program causes a massive memory leak.

#include <QString>

int main(int argc, char *argv[])
{
    forever
    {
        QString::number(0);
    }

    return 0;
}

Be careful while executing, it will eat up your memory very fast.

The same behaviour can be observed with Windows 7 Sp1!

The memory leak does not occur with Qt 4.8.4!