kopete crash when startup

Dapper flight-3
LANG="en_US.UTF-8"
LC_CTYPE="zh_CN.UTF-8"
LANGUAGE="en_US:en:zh_CN:zh"
export XMODIFIERS=@im=SCIM
export GTK_IM_MODULE=scim
export QT_IM_MODULE=scim
export QT_IM_SWITCHER=imsw-multi
libqt3-mt 3:3.3.5-1ubuntu14
scim 1.4.4
skim 1.4.3
following is gdb backstrace information :

QImage::smoothScale: Image is a null image
ScimInputContextPlugin()
QMultiInputContext::changeInputMethod(): index=0, slave=scim
kopete: ERROR: Communication problem with kopete, it probably crashed.
freeflying@MyBox:~$ KCrash: Application 'kopete' crashing...
ScimInputContextPlugin()
QMultiInputContext::changeInputMethod(): index=0, slave=scim

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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1241397024 (LWP 18294)]
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[KCrash handler]
#4 0xb60b3e88 in strcoll_l () from /lib/tls/i686/cmov/libc.so.6
#5 0xb60afd71 in strcoll () from /lib/tls/i686/cmov/libc.so.6
#6 0xb6c88173 in QString::localeAwareCompare () from /usr/lib/libqt-mt.so.3
#7 0xb6a57cbd in QListViewItem::compare () from /usr/lib/libqt-mt.so.3
#8 0xb6a6fe11 in QListViewPrivate::SortableItem::cmp ()
   from /usr/lib/libqt-mt.so.3
#9 0xb6a6feb6 in QListViewPrivate::SortableItem::operator< ()
   from /usr/lib/libqt-mt.so.3
#10 0xb6a71057 in qHeapSortHelper<QListViewPrivate::SortableItem*, QListViewPrivate::SortableItem> () from /usr/lib/libqt-mt.so.3
#11 0xb6a711a6 in qHeapSort<QListViewPrivate::SortableItem*> ()
   from /usr/lib/libqt-mt.so.3
#12 0xb6a6d2d7 in QListViewItem::sortChildItems () from /usr/lib/libqt-mt.so.3
#13 0xb6a58840 in QListViewItem::enforceSortOrder ()
   from /usr/lib/libqt-mt.so.3
#14 0xb6a57a79 in QListView::firstChild () from /usr/lib/libqt-mt.so.3
#15 0x08096412 in QDict<Kopete::Contact>::~QDict ()
#16 0x08096c49 in QDict<Kopete::Contact>::~QDict ()
#17 0x0808ae26 in KopeteContactListView::staticMetaObject ()
#18 0x08095383 in KopeteContactListView::staticMetaObject ()
#19 0xb696739a in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#20 0xb7e06e94 in Kopete::ContactList::metaContactAdded ()
   from /usr/lib/libkopete.so.1
#21 0xb7e06f0a in Kopete::ContactList::addMetaContact ()
   from /usr/lib/libkopete.so.1
#22 0xb7e57966 in Kopete::ContactList::loadXML () from /usr/lib/libkopete.so.1
#23 0xb7e57d22 in Kopete::ContactList::load () from /usr/lib/libkopete.so.1
#24 0x0807903a in ?? ()
#25 0x081f8140 in ?? ()
#26 0xb6e12fbc in ?? () from /usr/lib/libqt-mt.so.3
#27 0xbfd07e88 in ?? ()
#28 0xb688f5d3 in QMemArray<char>::~QMemArray () from /usr/lib/libqt-mt.so.3
#29 0x08079a38 in ?? ()
#30 0xbfd08570 in ?? ()
#31 0x08276d68 in ?? ()
#32 0xbfd07ee8 in ?? ()
#33 0xb6e12fbc in ?? () from /usr/lib/libqt-mt.so.3
#34 0x080799cc in ?? ()
#35 0x00000000 in ?? ()