abrt version: 1.1.14
architecture: i686
cmdline: python /usr/bin/printer-applet
comment: occurs after startup
component: kdeutils
executable: /usr/bin/printer-applet
kernel: 2.6.37-2.fc15.i686
package: kdeutils-printer-applet-6:4.5.95-1.fc15
reason: uiparser.py:161:createWidget:AttributeError: 'module' object has no attribute 'StackedWidget'
release: Fedora release 15 (Rawhide)
time: 1294849794
uid: 501

backtrace
-----
uiparser.py:161:createWidget:AttributeError: 'module' object has no attribute 'StackedWidget'

Traceback (most recent call last):
  File "/usr/bin/printer-applet", line 1163, in <module>
    applet = JobManager()
  File "/usr/bin/printer-applet", line 241, in __init__
    uic.loadUi(unicode(APPDIR + '/' + "printer-applet.ui"), self.mainWindow)
  File "/usr/lib/python2.7/site-packages/PyQt4/uic/__init__.py", line 185, in loadUi
    return DynamicUILoader().loadUi(uifile, baseinstance)
  File "/usr/lib/python2.7/site-packages/PyQt4/uic/Loader/loader.py", line 35, in loadUi
    return self.parse(filename, basedir)
  File "/usr/lib/python2.7/site-packages/PyQt4/uic/uiparser.py", line 839, in parse
    actor(elem)
  File "/usr/lib/python2.7/site-packages/PyQt4/uic/uiparser.py", line 686, in createUserInterface
    self.traverseWidgetTree(elem)
  File "/usr/lib/python2.7/site-packages/PyQt4/uic/uiparser.py", line 664, in traverseWidgetTree
    handler(self, child)
  File "/usr/lib/python2.7/site-packages/PyQt4/uic/uiparser.py", line 161, in createWidget
    QtGui.QScrollArea, QtGui.StackedWidget,
AttributeError: 'module' object has no attribute 'StackedWidget'

Local variables in innermost frame:
self: <PyQt4.uic.Loader.loader.DynamicUILoader object at 0xb7253fac>
widget_class: 'QWidget'
parent: <__main__.MainWindow object at 0xb724977c>
elem: <Element 'widget' at 0xb5423dcc>

How to reproduce
-----
1.on boot
2.
3.