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diff --git a/lisp/ChangeLog b/lisp/ChangeLog
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--- a/lisp/ChangeLog
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@@ -1,3 +1,19 @@
+2012-12-14  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Fix permissions bugs with setgid directories etc. (Bug#13125)
+        * files.el (backup-buffer): Don't rely on 9th output of
+        file-attributes, as it's now a placeholder.  Instead, use the new
+        optional arg of file-ownership-preserved-p.
+        (file-ownership-preserved-p): New optional arg GROUP.
+        Fix mishandling of setuid directories that would cause this
+        function to return t when it should have returned nil.
+        Document what happens if the file does not exist, and when
+        it's not known whether the ownership will be preserved.
+        * net/tramp-sh.el (tramp-sh-handle-file-ownership-preserved-p):
+        Likewise.
+        (tramp-get-local-gid): Use group-gid for integer, as that's
+        faster and more reliable.
+
 2012-12-14  Julien Danjou  <julien@danjou.info>
 
         * progmodes/sql.el (sql-mode-postgres-font-lock-keywords): Update