Reverted back to Version 2.2.2 sorted battery drain.
Noticed a new version released September 30, 2012:
What's in this version:
* Issue with proximity sensor was resolved
Also including the new features from v2.2:
* Group Messaging: you can now send free messages to groups of friends.
* Assign a custom background to conversation.
* Photos were added to the Contacts list.
That was fast. Will try it later.