It fails with both 1.1.1 and CVS with almost identical messages during make:

/bin/sh ../../../../../libtool --silent --mode=compile --tag=CXX g++ -DHAVE_CONFIG_H -I. -I. -I../../../../.. -I/usr/lib/qt3//include -I. -I/usr/include/arts -DQT_THREAD_SUPPORT -D_REENTRANT -Wnon-virtual-dtor -Wno-long-long -Wundef -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wconversion -Wchar-subscripts -Wall -W -Wpointer-arith -Wwrite-strings -O2 -Wformat-security -Wmissing-format-attribute -fno-exceptions -fno-check-new -fno-common -DQT_CLEAN_NAMESPACE -DQT_NO_ASCII_CAST -DQT_NO_STL -DQT_NO_COMPAT -DQT_NO_TRANSLATION -c -o rawscope_impl.lo `test -f 'rawscope_impl.cpp' || echo './'`rawscope_impl.cpp
/bin/sh ../../../../../libtool --silent --mode=link --tag=CXX g++ -Wnon-virtual-dtor -Wno-long-long -Wundef -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wconversion -Wchar-subscripts -Wall -W -Wpointer-arith -Wwrite-strings -O2 -Wformat-security -Wmissing-format-attribute -fno-exceptions -fno-check-new -fno-common -DQT_CLEAN_NAMESPACE -DQT_NO_ASCII_CAST -DQT_NO_STL -DQT_NO_COMPAT -DQT_NO_TRANSLATION -o libamarokarts.la -rpath /usr/lib -L/usr/lib -L/usr/lib/qt3//lib -L/usr/X11R6/lib -module -avoid-version -no-undefined -Wl,--no-undefined -Wl,--allow-shlib-undefined amarokarts.lo synth_stereo_xfade_impl.lo rawscope_impl.lo -lkmedia2_idl -lsoundserver_idl -lartsflow
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_stubE48_N4Arts16SynthModule_stubE+0xa8): undefined reference to `virtual thunk to Arts::SynthModule_stub::autoSuspend()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_stubE48_N4Arts16SynthModule_stubE+0xac): undefined reference to `virtual thunk to Arts::SynthModule_stub::start()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_stubE48_N4Arts16SynthModule_stubE+0xb0): undefined reference to `virtual thunk to Arts::SynthModule_stub::stop()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_stubE48_N4Arts16SynthModule_stubE+0xb4): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamInit()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_stubE48_N4Arts16SynthModule_stubE+0xb8): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamStart()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_stubE48_N4Arts16SynthModule_stubE+0xbc): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamEnd()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_stubE+0x58): undefined reference to `virtual thunk to Arts::SynthModule_stub::autoSuspend()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_stubE+0x5c): undefined reference to `virtual thunk to Arts::SynthModule_stub::start()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_stubE+0x60): undefined reference to `virtual thunk to Arts::SynthModule_stub::stop()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_stubE+0x64): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamInit()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_stubE+0x68): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamStart()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_stubE+0x6c): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamEnd()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE52_N4Arts16SynthModule_stubE+0xa8): undefined reference to `virtual thunk to Arts::SynthModule_stub::autoSuspend()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE52_N4Arts16SynthModule_stubE+0xac): undefined reference to `virtual thunk to Arts::SynthModule_stub::start()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE52_N4Arts16SynthModule_stubE+0xb0): undefined reference to `virtual thunk to Arts::SynthModule_stub::stop()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE52_N4Arts16SynthModule_stubE+0xb4): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamInit()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE52_N4Arts16SynthModule_stubE+0xb8): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamStart()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE52_N4Arts16SynthModule_stubE+0xbc): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamEnd()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE48_N4Arts17StereoEffect_stubE+0xb4): undefined reference to `virtual thunkto Arts::SynthModule_stub::autoSuspend()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE48_N4Arts17StereoEffect_stubE+0xb8): undefined reference to `virtual thunkto Arts::SynthModule_stub::start()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE48_N4Arts17StereoEffect_stubE+0xbc): undefined reference to `virtual thunkto Arts::SynthModule_stub::stop()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE48_N4Arts17StereoEffect_stubE+0xc0): undefined reference to `virtual thunkto Arts::SynthModule_stub::streamInit()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE48_N4Arts17StereoEffect_stubE+0xc4): undefined reference to `virtual thunkto Arts::SynthModule_stub::streamStart()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_stubE48_N4Arts17StereoEffect_stubE+0xc8): undefined reference to `virtual thunkto Arts::SynthModule_stub::streamEnd()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_stubE+0x64): undefined reference to `virtual thunk to Arts::SynthModule_stub::autoSuspend()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_stubE+0x68): undefined reference to `virtual thunk to Arts::SynthModule_stub::start()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_stubE+0x6c): undefined reference to `virtual thunk to Arts::SynthModule_stub::stop()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_stubE+0x70): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamInit()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_stubE+0x74): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamStart()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_stubE+0x78): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamEnd()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN4Arts17StereoEffect_stubE48_NS_16SynthModule_stubE+0xa8): undefined reference to `virtual thunk to Arts::SynthModule_stub::autoSuspend()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN4Arts17StereoEffect_stubE48_NS_16SynthModule_stubE+0xac): undefined reference to `virtual thunk to Arts::SynthModule_stub::start()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN4Arts17StereoEffect_stubE48_NS_16SynthModule_stubE+0xb0): undefined reference to `virtual thunk to Arts::SynthModule_stub::stop()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN4Arts17StereoEffect_stubE48_NS_16SynthModule_stubE+0xb4): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamInit()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN4Arts17StereoEffect_stubE48_NS_16SynthModule_stubE+0xb8): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamStart()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTCN4Arts17StereoEffect_stubE48_NS_16SynthModule_stubE+0xbc): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamEnd()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN4Arts17StereoEffect_stubE+0x50): undefined reference to `virtual thunk to Arts::SynthModule_stub::autoSuspend()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN4Arts17StereoEffect_stubE+0x54): undefined reference to `virtual thunk to Arts::SynthModule_stub::start()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN4Arts17StereoEffect_stubE+0x58): undefined reference to `virtual thunk to Arts::SynthModule_stub::stop()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN4Arts17StereoEffect_stubE+0x5c): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamInit()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN4Arts17StereoEffect_stubE+0x60): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamStart()'
.libs/amarokarts.o(.gnu.linkonce.d._ZTVN4Arts17StereoEffect_stubE+0x64): undefined reference to `virtual thunk to Arts::SynthModule_stub::streamEnd()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_implE+0x100): undefined reference to `virtual thunk to Arts::StdSynthModule::autoSuspend()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_implE+0x104): undefined reference to `virtual thunk to Arts::StdSynthModule::start()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_implE+0x108): undefined reference to `virtual thunk to Arts::StdSynthModule::stop()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_implE+0x10c): undefined reference to `virtual thunk to Arts::StdSynthModule::streamInit()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_implE+0x110): undefined reference to `virtual thunk to Arts::StdSynthModule::streamStart()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTVN6Amarok23Synth_STEREO_XFADE_implE+0x114): undefined reference to `virtual thunk to Arts::StdSynthModule::streamEnd()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_implE104_N4Arts14StdSynthModuleE+0xa4): undefined reference to `virtual thunk to Arts::StdSynthModule::autoSuspend()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_implE104_N4Arts14StdSynthModuleE+0xa8): undefined reference to `virtual thunk to Arts::StdSynthModule::start()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_implE104_N4Arts14StdSynthModuleE+0xac): undefined reference to `virtual thunk to Arts::StdSynthModule::stop()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_implE104_N4Arts14StdSynthModuleE+0xb0): undefined reference to `virtual thunk to Arts::StdSynthModule::streamInit()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_implE104_N4Arts14StdSynthModuleE+0xb4): undefined reference to `virtual thunk to Arts::StdSynthModule::streamStart()'
.libs/synth_stereo_xfade_impl.o(.gnu.linkonce.d._ZTCN6Amarok23Synth_STEREO_XFADE_implE104_N4Arts14StdSynthModuleE+0xb8): undefined reference to `virtual thunk to Arts::StdSynthModule::streamEnd()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_implE+0x64): undefined reference to `virtual thunk to Arts::StdSynthModule::autoSuspend()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_implE+0x68): undefined reference to `virtual thunk to Arts::StdSynthModule::start()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_implE+0x6c): undefined reference to `virtual thunk to Arts::StdSynthModule::stop()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_implE+0x70): undefined reference to `virtual thunk to Arts::StdSynthModule::streamInit()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_implE+0x74): undefined reference to `virtual thunk to Arts::StdSynthModule::streamStart()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTVN6Amarok13RawScope_implE+0x78): undefined reference to `virtual thunk to Arts::StdSynthModule::streamEnd()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_implE4_N4Arts14StdSynthModuleE+0xa4): undefined reference to `virtual thunk to Arts::StdSynthModule::autoSuspend()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_implE4_N4Arts14StdSynthModuleE+0xa8): undefined reference to `virtual thunk to Arts::StdSynthModule::start()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_implE4_N4Arts14StdSynthModuleE+0xac): undefined reference to `virtual thunk to Arts::StdSynthModule::stop()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_implE4_N4Arts14StdSynthModuleE+0xb0): undefined reference to `virtual thunk to Arts::StdSynthModule::streamInit()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_implE4_N4Arts14StdSynthModuleE+0xb4): undefined reference to `virtual thunk to Arts::StdSynthModule::streamStart()'
.libs/rawscope_impl.o(.gnu.linkonce.d._ZTCN6Amarok13RawScope_implE4_N4Arts14StdSynthModuleE+0xb8): undefined reference to `virtual thunk to Arts::StdSynthModule::streamEnd()'
collect2: ld returned 1 exit status
make[6]: *** [libamarokarts.la] Error 1
make[6]: Leaving directory `/tmp/amaroK-2004291164046.tmp/kdeextragear-1/amarok/src/engine/arts/amarokarts'
make[5]: *** [all-recursive] Error 1
make[5]: Leaving directory `/tmp/amaroK-2004291164046.tmp/kdeextragear-1/amarok/src/engine/arts'
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory `/tmp/amaroK-2004291164046.tmp/kdeextragear-1/amarok/src/engine'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/tmp/amaroK-2004291164046.tmp/kdeextragear-1/amarok/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/tmp/amaroK-2004291164046.tmp/kdeextragear-1/amarok'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/amaroK-2004291164046.tmp/kdeextragear-1'
make: *** [all] Error 2

So I still have to use 1.1 which has the double entries problem, and crashes quite often when new files are added to the virtual playlist.
Any ideas what's wrong?
(and yes, I even tried what's suggested for compiling under MDK 10.0 in a previous thread, the result was the same).

Plz disregard- it worked.
I just had to update my gstreamer binaries.
BTW 1.1.1 is a great step forward from 1.1
Best regards.