Opera 10.53 for Windows changelog
Advisory: Multiple asynchronous document modifications can be used to execute arbitrary code
Secunia Advisory SA39590 Opera Asynchronous Content Modification Uninitialised Memory Vulnerability
Solution
Update to version 10.53.
関連
http://d.hatena.ne.jp/noushibou/20100427/1272370636
対応はえ〜!