[Qt-embedded-interest] Qt Embedded 4.5 hang

[OSProg]

Hello,
I've worked with Qt 4.4.3, and I've updated to 4.5, which is much 
faster, but...
The problem is that QComboBox doesn't work for me. I've made a simple 
application - just QMainWindow and in constructor I create QComboBox 
widget like:
{
QComboBox *pcb = new QComboBox(this);

pcb->addItem("1");
pcb->addItem("2");
pcb->addItem("3");
pcb->move(10,10);
}
The result is - I have a ComboBox on the screen, but when I touch it all 
application freezes...
I subclassed the QComboBox to see the mosePrees events, and the event is 
called only once (first time when the widget is touched, next times - 
nothing).
Next I've subclassed QMainWindow to see if the events are received from 
other widgets. When QComboBox is not pressed all events are received, 
but when I touch the QComboBox - no more events come.
The same behavior is with QRadioButton widget.

When I run more complicated application, with animation framework, at 
the middle of the animation (at one and the same place) it hangs. The 
animation is just moving the widgets (no new widgets are created or 
deleted).
 
About the target -
BF527 EZKIT
Linux version 2.6.28-ADI-2009R1-pre-svn6000 (root at dlnx764) (gcc version 
4.1.2 (ADI svn))
Qt4.5
Has anybody faced similar issue?