yiisoft/yii — pull request #418 by dmtrs (2012-02-29 20:44:10+00:00)
Title: 417 CAttributeCollection mergeWith does not take into account $caseSensitive

As discussed in the ticket [#417](https://github.com/yiisoft/yii/issues/417) when merging in an attribute collection the caseSensitive property does not work.
I don't think this fix is the better provided due to some issue I had resolving the issue.
The CAttributeCollection does not have access to private CMap::_d, this means I could not use parent::mergeArray with first argument the actual collection. So, I had to call the CMap::mergeWith() which do same checks.