One of my favorite one-liners does the renaming thing, though I've never tested it it on subdirectories. FWIW: 
find . | perl -ne'chomp; next unless -e; $oldname = $_; s/aaa/bbb/; ne
+xt if -e; rename $oldname, $_'

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In reply to Re: rename subdirectories by perlfan
in thread rename subdirectories by shness

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