Version:            (using KDE KDE 3.2.0)
Installed from:    Gentoo Packages
Compiler:          gcc(GCC): 3.3.2 
OS:          Linux

Here's the backtrace:
(no debugging symbols found)...(no debugging symbols found)...
(no debugging symbols found)...0x4047f9b8 in waitpid ()
   from /lib/libpthread.so.0
#0  0x4047f9b8 in waitpid () from /lib/libpthread.so.0
#1  0x00000400 in ?? ()
#2  0x4047e6c3 in __pthread_clock_settime () from /lib/libpthread.so.0
#3  0x405d08d8 in __libc_sigaction () from /lib/libc.so.6
#4  0x4013a6b8 in Arts::VPortConnection::~VPortConnection() ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#5  0x40139c62 in Arts::VPortConnection::VPortConnection(Arts::VPort*, Arts::VPort*, Arts::VPortConnection::Style) () from /usr/kde/3.2/lib/libartsflow.so.1
#6  0x4013ab0d in Arts::VPort::virtualize(Arts::VPort*) ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#7  0x4011fd71 in Arts::StdScheduleNode::virtualize(std::string const&, Arts::ScheduleNode*, std::string const&) () from /usr/kde/3.2/lib/libartsflow.so.1
#8  0x4013bf0d in Arts::BusManager::addClient(std::string const&, Arts::BusClient*) () from /usr/kde/3.2/lib/libartsflow.so.1
#9  0x4013cc2b in Arts::Synth_BUS_UPLINK_impl::connect() ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#10 0x4013cb7b in Arts::Synth_BUS_UPLINK_impl::streamInit() ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#11 0x4011f8e1 in Arts::StdScheduleNode::start() ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#12 0x4012c08c in Arts::StdSynthModule::start() ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#13 0x4012c414 in virtual thunk to Arts::StdSynthModule::start() ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#14 0x40142e8f in Arts::Synth_AMAN_PLAY_impl::streamInit() ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#15 0x40142ec4 in virtual thunk to Arts::Synth_AMAN_PLAY_impl::streamInit() ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#16 0x4011f8e1 in Arts::StdScheduleNode::start() ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#17 0x4012c08c in Arts::StdSynthModule::start() ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#18 0x4012c414 in virtual thunk to Arts::StdSynthModule::start() ()
   from /usr/kde/3.2/lib/libartsflow.so.1
#19 0x40255899 in _dispatch_Arts_SynthModule_00(void*, Arts::Buffer*, Arts::Buffer*) () from /usr/kde/3.2/lib/libartsflow_idl.so.1
#20 0x403714d6 in Arts::Object_skel::_dispatch(Arts::Buffer*, Arts::Buffer*, long) () from /usr/kde/3.2/lib/libmcop.so.1
#21 0x40369042 in Arts::Dispatcher::handle(Arts::Connection*, Arts::Buffer*, long) () from /usr/kde/3.2/lib/libmcop.so.1
#22 0x403434b1 in Arts::Connection::receive(unsigned char*, long) ()
   from /usr/kde/3.2/lib/libmcop.so.1
#23 0x40376877 in Arts::SocketConnection::notifyIO(int, int) ()
   from /usr/kde/3.2/lib/libmcop.so.1
#24 0x4036cd79 in Arts::StdIOManager::processOneEvent(bool) ()
   from /usr/kde/3.2/lib/libmcop.so.1
#25 0x4036d4f0 in Arts::StdIOManager::run() ()
   from /usr/kde/3.2/lib/libmcop.so.1
#26 0x4036ab97 in Arts::Dispatcher::run() () from /usr/kde/3.2/lib/libmcop.so.1
#27 0x08062fc7 in std::_Rb_tree_rotate_right(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*&) ()
#28 0x405bcdcc in __libc_start_main () from /lib/libc.so.6