I am referring to kde bug: http://bugs.kde.org/show_bug.cgi?id=158501 which is a problem for us using 32bit plugins on 64 bit systems. I applied the patch but, at least on Fedora 8, the $LIB environment variable does not seem to be substituted dynamically (is blank). So, I use 64 bit konqueror, with 32bit nspluginscan and nspluginviewer, and 32bit plugins for various things. Everything works except: ERROR: ld.so: object '/usr/lib/libartsdsp.so.0' from LD_PRELOAD cannot be preloaded: ignored. ERROR: ld.so: object '/usr/lib/libartsc.so.0' from LD_PRELOAD cannot be preloaded: ignored. ERROR: ld.so: object '/usr/lib/libartsdsp.so.0' from LD_PRELOAD cannot be preloaded: ignored. ERROR: ld.so: object '/usr/lib/libartsc.so.0' from LD_PRELOAD cannot be preloaded: ignored. ERROR: ld.so: object '/usr/lib/libartsdsp.so.0' from LD_PRELOAD cannot be preloaded: ignored. ERROR: ld.so: object '/usr/lib/libartsc.so.0' from LD_PRELOAD cannot be preloaded: ignored. The files are actually there! Is this the problem?
Not really a fix, but if possible, I'd recommend turning off the artsdsp hack for plugins altogether and get them to use PulseAudio instead. How exactly depends on the plugin. For Adobe Flash, there's a libflashsupport in the repository which adds PulseAudio support. For plugins using something like GStreamer or xine-lib, reconfiguring them should be enough.
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Upstream claims this is fixed in 1.5.10 (see upstream bug report).