diff -ru cabocha-0.52.old/src/common.h cabocha-0.52/src/common.h
--- cabocha-0.52.old/src/common.h	2004-03-08 23:18:39.000000000 +0900
+++ cabocha-0.52/src/common.h	2005-09-20 13:08:33.000000000 +0900
@@ -102,7 +102,7 @@
    
   static inline void replaceString (std::string &s, const std::string &src, const std::string &dst)
   {
-    unsigned int pos = s.find (src);
+    size_t pos = s.find (src);
     if (pos != std::string::npos) s.replace (pos, src.size(), dst);
   }
 
cabocha-0.52/srcだけに発見: common.h~