"mixi" (who is also a user on Twitter) has been ++'ed 2 times and --'ed 2 times by a total of 3 people.
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Operation Sign, User and Reason
++'ed by ku (http://tinyurl.com/6rw2k3)
Tweet: mixi++ http://tinyurl.com/6rw2k3
--'ed by Hamachiya2
Tweet: mixi--
++'ed by None (non-table layout)
Tweet: mixi++ non-table layout
--'ed by None (perfumeの使い方が挿絵レベル)
Tweet: mixi-- perfumeの使い方が挿絵レベル