diff -ur rosegarden-1.5.1/src/sound/DSSIPluginFactory.cpp rosegarden.patched/src/sound/DSSIPluginFactory.cpp
--- rosegarden-1.5.1/src/sound/DSSIPluginFactory.cpp	2007-03-13 07:50:32.000000000 -0500
+++ rosegarden.patched/src/sound/DSSIPluginFactory.cpp	2007-05-02 16:53:10.000000000 -0500
@@ -243,7 +243,7 @@
         path = cpath;
 
     if (path == "") {
-        path = "/usr/local/lib/dssi:/usr/lib/dssi";
+        path = "/usr/local/lib64/dssi:/usr/lib64/dssi";
         char *home = getenv("HOME");
         if (home)
             path = std::string(home) + "/.dssi:" + path;
diff -ur rosegarden-1.5.1/src/sound/LADSPAPluginFactory.cpp rosegarden.patched/src/sound/LADSPAPluginFactory.cpp
--- rosegarden-1.5.1/src/sound/LADSPAPluginFactory.cpp	2007-03-13 07:50:32.000000000 -0500
+++ rosegarden.patched/src/sound/LADSPAPluginFactory.cpp	2007-05-02 16:53:52.000000000 -0500
@@ -527,7 +527,7 @@
         path = cpath;
 
     if (path == "") {
-        path = "/usr/local/lib/ladspa:/usr/lib/ladspa";
+        path = "/usr/local/lib64/ladspa:/usr/lib64/ladspa";
         char *home = getenv("HOME");
         if (home)
             path = std::string(home) + "/.ladspa:" + path;
@@ -722,9 +722,9 @@
     std::vector<QString> path;
 
     for (size_t i = 0; i < pluginPath.size(); ++i) {
-        if (pluginPath[i].contains("/lib/")) {
+        if (pluginPath[i].contains("/lib64/")) {
             QString p(pluginPath[i]);
-            p.replace("/lib/", "/share/");
+            p.replace("/lib64/", "/share/");
             path.push_back(p);
             //	    std::cerr << "LADSPAPluginFactory::generateFallbackCategories: path element " << p << std::endl;
         }