The Exchange team updated the Exchange Server 2010 2 Language Pack.
As you may or may not know, installing SP2 on Client Access Servers introduced the breadcrumb issue which I reported here.
Unfortunately, the Language Pack (included in SP2) which was updated to fix this issue introduced an annoyance on SP2 RU1 multi-role servers, by flooding the Eventlog with 10013 error messages for non-“en-us” users after installing SP2 RU1:
The Active Directory entry for mailbox CN contains an invalid locale for attribute MsExchUserCulture: nl-NL
You can download the updated language pack bundle here. Note that you only need to apply the update on Client Access Servers.