Exception of type Microsoft.Office.Server.UserProfiles.UserProfileException

Scenario:

Failed to create sample data.
An exception of type Microsoft.Office.Server.UserProfiles.UserProfileException was thrown. Additional exception information: Unrecognized attribute 'allowInsecureTransport'. Note that attribute names are case-sensitive. (C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\WebClients\Profile\client.config line 56)



Solution:
Install following hotfixes and re-boot the server

Download available here:
KB971831 - Windows Server 2008 Service Pack 2, Windows Vista Service Pack 1 or Windows Vista Service Pack 2

KB976462 - Windows Server 2008 R2 and Windows 7