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+Sun Jun 22 00:38:45 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* README.EXT.ja: add note about mark and free.
+
 Sun Jun 22 00:01:36 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* io.c (rb_io_binmode_p, argf_binmode_p, Init_IO): new method