yiisoft/yii — pull request #654 by Bethrezen (2012-04-30 16:30:33+00:00)
Title: fixed #652 - yiiGridView now checks if event was already attached

Here is my patch for issue #652. Don't know if it is perfect and works in all 100% cases, but in mine it helped.
I've also checked copatability with selecting rows and CCheckBoxColumn. It seems to be ok.