crash when searching ampache

After setting up an ampache server (debian lenny), amarok crashes when try to search from the internet => ampache view. Happening in jaunty i686.

Backtrace:

[Switching to Thread 0xb3f16710 (LWP 10653)]
QString::operator= (this=0x44, other=@0xbfccd9a8) at tools/qstring.cpp:1130
1130 tools/qstring.cpp: No such file or directory.
 in tools/qstring.cpp
Current language: auto; currently c++
(gdb) bt
#0 QString::operator= (this=0x44, other=@0xbfccd9a8) at tools/qstring.cpp:1130
#1 0xb7956b67 in CollectionTreeItemModelBase::setCurrentFilter () from /usr/lib/libamaroklib.so.1
#2 0xb795fcb4 in ?? () from /usr/lib/libamaroklib.so.1
#3 0xb79660fb in ?? () from /usr/lib/libamaroklib.so.1
#4 0xb6a45ca8 in QMetaObject::activate (sender=0xbc21b88, from_signal_index=27, to_signal_index=27, argv=0xbfccdabc) at kernel/qobject.cpp:3069
#5 0xb6a46932 in QMetaObject::activate (sender=0xbc21b88, m=0xb7793648, local_signal_index=0, argv=0xbfccdabc) at kernel/qobject.cpp:3143
#6 0xb733f8b3 in QLineEdit::textChanged (this=0xbc21b88, _t1=@0xbfccdb04) at .moc/release-shared/moc_qlineedit.cpp:228
#7 0xb7344f0a in QLineEditPrivate::finishChange (this=0xbc21bb0, validateFromState=0, update=false, edited=true) at widgets/qlineedit.cpp:2975
#8 0xb734595b in QLineEdit::insert (this=0xbc21b88, newText=@0xbfccdb60) at widgets/qlineedit.cpp:1408
#9 0xb7347547 in QLineEdit::keyPressEvent (this=0xbc21b88, event=0xbfcce1dc) at widgets/qlineedit.cpp:2176
#10 0xb7eda795 in KLineEdit::keyPressEvent (this=0xbc21b88, e=0xbfcce1dc) at /build/buildd/kde4libs-4.2.2/kdeui/widgets/klineedit.cpp:892
#11 0xb6f57a93 in QWidget::event (this=0xbc21b88, event=0xbfcce1dc) at kernel/qwidget.cpp:7551
#12 0xb7345345 in QLineEdit::event (this=0xbc21b88, e=0xbfcce1dc) at widgets/qlineedit.cpp:1681
#13 0xb7edbcea in KLineEdit::event (this=0xbc21b88, ev=0xbfcce1dc) at /build/buildd/kde4libs-4.2.2/kdeui/widgets/klineedit.cpp:1309
#14 0xb6f00f2c in QApplicationPrivate::notify_helper (this=0x9a82d20, receiver=0xbc21b88, e=0xbfcce1dc) at kernel/qapplication.cpp:4084
#15 0xb6f0a2eb in QApplication::notify (this=0xbfccec84, receiver=0xbc21b88, e=0xbfcce1dc) at kernel/qapplication.cpp:3690
#16 0xb7dfe94d in KApplication::notify (this=0xbfccec84, receiver=0xbc21b88, event=0xbfcce1dc)
    at /build/buildd/kde4libs-4.2.2/kdeui/kernel/kapplication.cpp:307
#17 0xb6a2fa3b in QCoreApplication::notifyInternal (this=0xbfccec84, receiver=0xbc21b88, event=0xbfcce1dc) at kernel/qcoreapplication.cpp:602
#18 0xb6f01e0e in qt_sendSpontaneousEvent (receiver=0xbc21b88, event=0xbfccd901) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#19 0xb6f9f0a0 in QKeyMapper::sendKeyEvent (keyWidget=0xbc21b88, grab=false, type=QEvent::KeyPress, code=84, modifiers={i = -1077091544}, text=@0xbfcce354,
    autorepeat=<value optimized out>, count=<value optimized out>, nativeScanCode=28, nativeVirtualKey=116, nativeModifiers=0)
    at kernel/qkeymapper_x11.cpp:1675
#20 0xb6fa126e in QKeyMapperPrivate::translateKeyEvent (this=0x9aa9988, keyWidget=0xbc21b88, event=0xbfcce9bc, grab=184) at kernel/qkeymapper_x11.cpp:1645
#21 0xb6f76dfe in QApplication::x11ProcessEvent (this=0xbfccec84, event=0xbfcce9bc) at kernel/qapplication_x11.cpp:3436
#22 0xb6fa2cfa in x11EventSourceDispatch (s=0x9a80168, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#23 0xb4454b88 in IA__g_main_context_dispatch (context=0x9a7ef10) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:1814
#24 0xb44580eb in g_main_context_iterate (context=0x9a7ef10, block=1, dispatch=1, self=0x9a82c80) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2448
#25 0xb4458268 in IA__g_main_context_iteration (context=0x9a7ef10, may_block=1) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#26 0xb6a5b438 in QEventDispatcherGlib::processEvents (this=0x9a633f8, flags={i = -1077089416}) at kernel/qeventdispatcher_glib.cpp:323
#27 0xb6fa23f5 in QGuiEventDispatcherGlib::processEvents (this=0x9a633f8, flags={i = -1077089368}) at kernel/qguieventdispatcher_glib.cpp:202
#28 0xb6a2e06a in QEventLoop::processEvents (this=0xbfccec20, flags={i = -1077089304}) at kernel/qeventloop.cpp:149
#29 0xb6a2e4aa in QEventLoop::exec (this=0xbfccec20, flags={i = -1077089240}) at kernel/qeventloop.cpp:200
#30 0xb6a30959 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#31 0xb6f00da7 in QApplication::exec () at kernel/qapplication.cpp:3553
#32 0x0814c4b2 in _start ()