>>26
MS-IMEのバグですよ

http://www.ne.jp/asahi/iremon/hp/support.aspx?scid=http://www.microsoft.com%2Fisapi%2Fgomscom.asp%3FTARGET%3D%2Fjapan%2Fsupport%2Fkb%2Farticles%2FJP353%2F5%2F74.asp