this is based on the http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=675063 patch from "aiht" <aihtdikh@gmail.com>.

Index: libextractor-0.6.3/src/main/extractor.c
===================================================================
--- libextractor-0.6.3.orig/src/main/extractor.c	2012-06-04 19:58:26.873816051 +0000
+++ libextractor-0.6.3/src/main/extractor.c	2012-06-06 07:30:30.001564926 +0000
@@ -524,7 +524,17 @@
       if ( (NULL != (la = strstr (ent->d_name, ".la"))) &&
 	   (la[3] == '\0') )
 	continue; /* only load '.so' and '.dll' */
-      sym_name = strstr (ent->d_name, "_");
+      sym_name = strchr (ent->d_name, '_');
+#if DEBUG >3 
+    fprintf (stderr,
+	     "check dir_name `%s'\n",
+	     ent->d_name);
+
+    fprintf (stderr,
+	     "check sym_name `%s'\n",
+	     sym_name);
+#endif
+
       if (sym_name == NULL)
 	continue;	
       sym_name++;
@@ -534,7 +544,7 @@
 	  closedir (dir);
 	  return;
 	}
-      dot = strstr (sym, ".");
+      dot = strchr (sym, '.');
       if (dot != NULL)
 	*dot = '\0';
       if (0 == strcmp (sym, sc->short_name))
@@ -546,12 +556,20 @@
       free (sym);
     }
 #if DEBUG
-  if (sc->path == NULL)
+  if (sc->path == NULL) {
     fprintf (stderr,
 	     "Failed to find plugin `%s' in `%s'\n",
 	     sc->short_name,
 	     path);
-#endif
+  }
+  else {
+    fprintf (stderr,
+	     "check plugin `%s' in `%s' %s\n",
+	     sc->short_name,
+	     path,
+	     sc->path);
+  }
+ #endif
   closedir (dir);
 }
 
@@ -613,7 +631,16 @@
 	     (la[2] == '\0')) )
 	continue; /* only load '.so' and '.dll' */
 
-      sym_name = strstr (ent->d_name, "_");
+      sym_name = strchr (ent->d_name, '_');
+#if DEBUG >3 
+    fprintf (stderr,
+	     "check dir_name1 `%s'\n",
+	     ent->d_name);
+
+    fprintf (stderr,
+	     "check sym_name1 `%s'\n",
+	     sym_name);
+#endif
       if (sym_name == NULL)
 	continue;
       sym_name++;
@@ -623,7 +650,7 @@
 	  closedir (dir);
 	  return;
 	}
-      dot = strstr (sym, ".");
+      dot = strchr (sym, '.');
       if (dot != NULL)
 	*dot = '\0';
 #if DEBUG > 1
@@ -683,6 +710,13 @@
 		       const char *prefix,
 		       const char **options)
 {
+
+#if DEBUG >3 
+  fprintf(stderr,"get_symbol_with_prefix(template %s,prefix %s,)",
+	  template,
+	  prefix);
+#endif
+
   char *name;
   void *symbol;
   const char *sym_name;
@@ -691,14 +725,14 @@
   const char *(*opt_fun)(void);
 
   if (NULL != options) *options = NULL;
-  sym_name = strstr (prefix, "_");
+  sym_name = strstr (prefix, "libextractor_")+12;
   if (sym_name == NULL)
     return NULL;
   sym_name++;
   sym = strdup (sym_name);
   if (sym == NULL)
     return NULL;
-  dot = strstr (sym, ".");
+  dot = strchr (sym, '.');
   if (dot != NULL)
     *dot = '\0';
   name = malloc(strlen(sym) + strlen(template) + 1);