i have this bug:

Application: Amarok (amarok), signal SIGABRT
[Current thread is 0 (LWP 11295)]

Thread 2 (Thread 0xb3fa7b90 (LWP 11297)):
#0  0xb80c0430 in __kernel_vsyscall ()
#1  0xb6bac167 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb3fc8532 in ?? () from /usr/lib/libpulse.so.0
#3  0xb3fba509 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#4  0xb3fbbcd3 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#5  0xb3fbbda4 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#6  0xb3fc82e3 in ?? () from /usr/lib/libpulse.so.0
#7  0xb3fe98e2 in ?? () from /usr/lib/libpulse.so.0
#8  0xb69e550f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#9  0xb6bb6a0e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb49a46c0 (LWP 11295)):
[KCrash Handler]
#5  0xb80c0430 in __kernel_vsyscall ()
#6  0xb6b008a0 in raise () from /lib/tls/i686/cmov/libc.so.6
#7  0xb6b02268 in abort () from /lib/tls/i686/cmov/libc.so.6
#8  0xb7eae795 in qt_message_output () from /usr/lib/libQtCore.so.4
#9  0xb7eae872 in qFatal () from /usr/lib/libQtCore.so.4
#10 0xb7eae915 in qt_assert () from /usr/lib/libQtCore.so.4
#11 0xb447a8c9 in ?? () from /usr/lib/libkaudiodevicelist.so.4
#12 0xb447ac3b in ?? () from /usr/lib/libkaudiodevicelist.so.4
#13 0xb447b7db in Phonon::HardwareDatabase::contains () from /usr/lib/libkaudiodevicelist.so.4
#14 0xb446b2b8 in ?? () from /usr/lib/libkaudiodevicelist.so.4
#15 0xb446c5aa in Phonon::AudioDevice::AudioDevice () from /usr/lib/libkaudiodevicelist.so.4
#16 0xb4474ba5 in ?? () from /usr/lib/libkaudiodevicelist.so.4
#17 0xb4475e24 in ?? () from /usr/lib/libkaudiodevicelist.so.4
#18 0xb447617b in Phonon::AudioDeviceEnumerator::self () from /usr/lib/libkaudiodevicelist.so.4
#19 0xb44f57f7 in ?? () from /usr/lib/kde4/plugins/phonon_platform/kde.so
#20 0xb44ef6fe in ?? () from /usr/lib/kde4/plugins/phonon_platform/kde.so
#21 0xb44ef7ff in ?? () from /usr/lib/kde4/plugins/phonon_platform/kde.so
#22 0xb61901bc in ?? () from /usr/lib/libphonon.so.4
#23 0xb619066e in ?? () from /usr/lib/libphonon.so.4
#24 0xb618ae41 in ?? () from /usr/lib/libphonon.so.4
#25 0xb618bb06 in Phonon::AudioOutput::AudioOutput () from /usr/lib/libphonon.so.4
#26 0xb6e934ea in EngineController::EngineController () from /usr/lib/libamaroklib.so.1
#27 0xb6e93a86 in EngineController::instance () from /usr/lib/libamaroklib.so.1
#28 0xb6e93aa7 in The::engineController () from /usr/lib/libamaroklib.so.1
#29 0xb6ea0778 in MainWindow::MainWindow () from /usr/lib/libamaroklib.so.1
#30 0xb6e850ee in App::continueInit () from /usr/lib/libamaroklib.so.1
#31 0xb6e8862c in App::App () from /usr/lib/libamaroklib.so.1
#32 0x0804c033 in _start ()


What can i do?

What DID you do?