Windows appeared after entering system account cannot be read because it is very long

[Gannet]

After upgrading from Kubuntu 11.10 with KDE 4.8.2 to Kubuntu 12.04 with KDE 4.8.2. each time system starts a lamp icon appears in a tray. After clicking on it with left mouse button, strange black window appears looking as a black horizontal line through the all screen. If turting off compositing window's content appears but since it such long it cannot be readed normally. The window must be normal of size but not such as you can see on a screenshots.

Screenshots of a window you can see here: https://bugs.kde.org/show_bug.cgi?id=298979

Proof that problem is in kdelibs here:

_NET_WM_USER_TIME(CARDINAL) = 5807322
_NET_WM_ICON_GEOMETRY(CARDINAL) = 420, 0, 40, 40
_NET_WM_ALLOWED_ACTIONS(ATOM) = _NET_WM_ACTION_MOVE, _NET_WM_ACTION_RESIZE, _NET_WM_ACTION_MINIMIZE, _NET_WM_ACTION_SHADE, _NET_WM_ACTION_MAXIMIZE_VERT, _NET_WM_ACTION_MAXIMIZE_HORZ, _NET_WM_ACTION_CHANGE_DESKTOP, _NET_WM_ACTION_CLOSE
_KDE_NET_WM_TAB_GROUP(CARDINAL) = 9
_NET_WM_DESKTOP(CARDINAL) = 0
_KDE_NET_WM_FRAME_STRUT(CARDINAL) = 3, 3, 23, 4
_NET_FRAME_EXTENTS(CARDINAL) = 3, 3, 23, 4
WM_STATE(WM_STATE):
  window state: Normal
  icon window: 0x0
_NET_WM_STATE(ATOM) = _NET_WM_STATE_MAXIMIZED_HORZ
_NET_WM_SYNC_REQUEST_COUNTER(CARDINAL) = 12582999
WM_TRANSIENT_FOR(WINDOW): window id # 0xc00004
_KDE_OXYGEN_BACKGROUND_PIXMAP(CARDINAL) = 0
_KDE_OXYGEN_BACKGROUND_GRADIENT(CARDINAL) = 1
_NET_STARTUP_ID(UTF8_STRING) = "0"
_KDE_NET_WM_USER_CREATION_TIME(CARDINAL) = 4767060
_NET_WM_ICON(CARDINAL) = Icon (16 x 16):

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XdndAware(ATOM) = BITMAP
_MOTIF_DRAG_RECEIVER_INFO(_MOTIF_DRAG_RECEIVER_INFO) = 0x6c, 0x0, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0
_NET_WM_NAME(UTF8_STRING) = "Інформація щодо оновлення – Фонова служба KDE"
WM_CLIENT_LEADER(WINDOW): window id # 0xc00004
_NET_WM_PID(CARDINAL) = 3221
_NET_WM_WINDOW_TYPE(ATOM) = _NET_WM_WINDOW_TYPE_DIALOG, _NET_WM_WINDOW_TYPE_NORMAL
_MOTIF_WM_HINTS(_MOTIF_WM_HINTS) = 0x3, 0x26, 0x1e, 0x0, 0x0
WM_PROTOCOLS(ATOM): protocols WM_DELETE_WINDOW, WM_TAKE_FOCUS, _NET_WM_PING, _NET_WM_SYNC_REQUEST, _NET_WM_CONTEXT_HELP
WM_NAME(COMPOUND_TEXT) = "Інформація щодо оновлення – Фонова служба KDE"
WM_LOCALE_NAME(STRING) = "uk_UA.UTF-8"
WM_CLASS(STRING) = "kded4", "Kded4"
WM_HINTS(WM_HINTS):
  Client accepts input or input focus: True
  Initial state is Normal State.
  bitmap id # to use for icon: 0xc00022
  window id # of group leader: 0xc00004
WM_NORMAL_HINTS(WM_SIZE_HINTS):
  program specified minimum size: 14579 by 221
  window gravity: NorthWest
WM_CLIENT_MACHINE(STRING) = "HOME"
WM_COMMAND(STRING) = { "/usr/bin/kded4" }

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: kdelibs-bin 4:4.8.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Sat Apr 28 22:43:56 2012
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcEnviron:
 LANGUAGE=uk_UA
 TERM=xterm
 LANG=uk_UA.UTF-8
 SHELL=/bin/bash
SourcePackage: kde4libs
UpgradeStatus: Upgraded to precise on 2012-04-27 (0 days ago)