Crash of Kate when closing files, only using polyester style

Binary package hint: kdebase

Sometimes when I close files in kate, it crashes.

Here is the backtrace :

#6 0x08892751 in ?? ()
#7 0xb716baf0 in QApplication::internalNotify (this=0xbfbdcd2c,
    receiver=0x881e588, e=0xbfbdc0d4) at kernel/qapplication.cpp:2635
#8 0xb716d91f in QApplication::notify (this=0xbfbdcd2c, receiver=0x881e588,
    e=0xbfbdc0d4) at kernel/qapplication.cpp:2358
#9 0xb7874242 in KApplication::notify (this=0xbfbdcd2c, receiver=0x881e588,
    event=0xbfbdc0d4)
    at /build/buildd/kdelibs-3.5.7/./kdecore/kapplication.cpp:550
#10 0xb70fe209 in QApplication::sendEvent (receiver=0x881e588,
    event=0xbfbdc0d4) at ../include/qapplication.h:520
#11 0xb71384a5 in QWidget::repaint (this=0x881e588, x=0, y=0, w=141, h=24,
    erase=false) at kernel/qwidget_x11.cpp:1593
#12 0xb7212955 in QWidget::repaint (this=0x881e588, r=@0xbfbdc180,
    erase=false) at .moc/debug-shared-mt/../../kernel/qwidget.h:839
#13 0xb7210a1c in QWidget::repaint (this=0x881e588, erase=false)
    at kernel/qwidget.cpp:6032
#14 0xb6238f34 in PolyesterStyle::animate ()
   from /usr/lib/kde3/plugins/styles/polyester.so
#15 0xb623d370 in PolyesterStyle::qt_invoke ()
   from /usr/lib/kde3/plugins/styles/polyester.so
#16 0xb71d4893 in QObject::activate_signal (this=0x80fda18, clist=0x80fd968,
    o=0xbfbdc2cc) at kernel/qobject.cpp:2356
#17 0xb71d5338 in QObject::activate_signal (this=0x80fda18, signal=2)
    at kernel/qobject.cpp:2325
#18 0xb75629ae in QTimer::timeout (this=0x80fda18)
    at .moc/debug-shared-mt/moc_qtimer.cpp:82
#19 0xb71fc5ba in QTimer::event (this=0x80fda18, e=0xbfbdc5f8)
    at kernel/qtimer.cpp:219
#20 0xb716baf0 in QApplication::internalNotify (this=0xbfbdcd2c,
    receiver=0x80fda18, e=0xbfbdc5f8) at kernel/qapplication.cpp:2635
#21 0xb716d91f in QApplication::notify (this=0xbfbdcd2c, receiver=0x80fda18,
    e=0xbfbdc5f8) at kernel/qapplication.cpp:2358
#22 0xb7874242 in KApplication::notify (this=0xbfbdcd2c, receiver=0x80fda18,
    event=0xbfbdc5f8)
    at /build/buildd/kdelibs-3.5.7/./kdecore/kapplication.cpp:550
#23 0xb70fe209 in QApplication::sendEvent (receiver=0x80fda18,
    event=0xbfbdc5f8) at ../include/qapplication.h:520
#24 0xb715e53b in QEventLoop::activateTimers (this=0x80e67b0)
    at kernel/qeventloop_unix.cpp:556
#25 0xb7112d49 in QEventLoop::processEvents (this=0x80e67b0, flags=4)
    at kernel/qeventloop_x11.cpp:389
#26 0xb71861ce in QEventLoop::enterLoop (this=0x80e67b0)
    at kernel/qeventloop.cpp:198
#27 0xb7185fde in QEventLoop::exec (this=0x80e67b0)
    at kernel/qeventloop.cpp:145
#28 0xb716d699 in QApplication::exec (this=0xbfbdcd2c)
    at kernel/qapplication.cpp:2758
#29 0xb65cfd43 in kdemain () from /usr/lib/libkdeinit_kate.so
#30 0xb7f03454 in kdeinitmain () from /usr/lib/kde3/kate.so
#31 0x0804e6bf in launch (argc=3, _name=0x807f4c4 "kate", args=0x807f509 "",
    cwd=0x0, envc=0, envs=0x807f50e "", reset_env=false, tty=0x0,
    avoid_loops=false, startup_id_str=0x805102e "0")
    at /build/buildd/kdelibs-3.5.7/./kinit/kinit.cpp:673
#32 0x0804ef4f in handle_launcher_request (sock=9)
    at /build/buildd/kdelibs-3.5.7/./kinit/kinit.cpp:1240
#33 0x0804f328 in handle_requests (waitForPid=0)
    at /build/buildd/kdelibs-3.5.7/./kinit/kinit.cpp:1443
#34 0x080505bc in main (argc=5, argv=0xbfbdd4d4, envp=0xbfbdd4ec)
    at /build/buildd/kdelibs-3.5.7/./kinit/kinit.cpp:1909
#35 0xb7c5e050 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#36 0x0804bb71 in _start ()