Version:           1.5.1 (using KDE KDE 3.5.1)
Installed from:    Slackware Packages
Compiler:           installed from the packages at linuxpackages.net
OS:                Linux

every startup of kde, a huge number of crash report windows pop up. Then there a message: Device or resource is busy. 
This is the backtrace:

(no debugging symbols found)
Using host libthread_db library "/lib/tls/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1217370432 (LWP 2498)]
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[KCrash handler]
#12 0xb7731027 in raise () from /lib/tls/libc.so.6
#13 0xb7732747 in abort () from /lib/tls/libc.so.6
#14 0xb772a85f in __assert_fail () from /lib/tls/libc.so.6
#15 0xb7ee2a18 in Arts::PlayObject_base::_create ()
   from /opt/kde/lib/libkmedia2_idl.so.1
#16 0x080548ea in ?? ()
#17 0xbff886f0 in ?? ()
#18 0xbff88740 in ?? ()
#19 0xbff887e0 in ?? ()
#20 0xffffffff in ?? ()
#21 0x080da2c8 in ?? ()
#22 0x00f8cfd8 in ?? ()
#23 0xbff887e0 in ?? ()
#24 0xbff88800 in ?? ()
#25 0xbff88754 in ?? ()
#26 0xb7f7e598 in _dl_lookup_symbol_x () from /lib/ld-linux.so.2
#27 0xb7eef571 in Arts::PlayObjectFactoryV2_skel::_interfaceNameSkel ()
   from /opt/kde/lib/libkmedia2_idl.so.1
#28 0xb7b82dff in Arts::Object_skel::_dispatch ()
   from /opt/kde/lib/libmcop.so.1
#29 0xb7b78b35 in Arts::Dispatcher::handle () from /opt/kde/lib/libmcop.so.1
#30 0xb7b4b00e in Arts::Connection::receive () from /opt/kde/lib/libmcop.so.1
#31 0xb7b8a0e6 in Arts::SocketConnection::notifyIO ()
   from /opt/kde/lib/libmcop.so.1
#32 0xb7b7d4f7 in Arts::StdIOManager::processOneEvent ()
   from /opt/kde/lib/libmcop.so.1
#33 0xb7b7d9eb in Arts::StdIOManager::run () from /opt/kde/lib/libmcop.so.1
#34 0xb7b7ac38 in Arts::Dispatcher::run () from /opt/kde/lib/libmcop.so.1
#35 0x0806351c in Arts::SoundServer_skel::~SoundServer_skel ()
#36 0xb771dfcb in __libc_start_main () from /lib/tls/libc.so.6
#37 0x08053dc1 in ?? ()