New KB article 932862 was published yesterday to discuss issues which may occur after applying BitLocker schema extensions in Active Directory forest under some conditions. As this KB states:
This problem occurs if the following conditions are true:
|•||The Active Directory domain that includes the BitLocker Drive Encryption schema updates contains Windows Server 2003-based domain controllers.|
|•||One or more of the Windows Server 2003-based domain controllers are configured to use one of the following language locales.|
This article provides whole list of language locales which may cause a problem as well as some workaround procedure (which is instruction how to remove index which is causing this issue). Worth checking before extending schema for BitLocker recovery support.