[svn] 3161: Fix more fallout from the display object sharing optimization.

Revision: 3161
Author: gruehle@adobe.com
Date: 2008-09-09 17:44:06 -0700 (Tue, 09 Sep 2008)

Log Message:
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Fix more fallout from the display object sharing optimization.

Bugs:
SDK-16774: Adding a string to a Group in between a graphic item and data item causes an RTE
MXMLG-221: Group with blendMode="layer" no longer renders any differently

QA: Regression test for MXMLG-221 should be added
Reviewer: Deepa

Ticket Links:
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http://bugs.adobe.com/jira/browse/SDK-16774
http://bugs.adobe.com/jira/browse/MXMLG-221
http://bugs.adobe.com/jira/browse/MXMLG-221

Modified Paths:
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flex/sdk/trunk/frameworks/projects/flex4/src/flex/core/Group.as