contains an invalid locale for attribute MsExchUserCulture Exchange 2010

I transitioned my Exchange 2007 to Exchange 2010.
After doing so i am getting Error events in the event log every 20 sec or so with the message

The Active Directory entry for mailbox /DC=<Domain>/DC=<Domain>/OU=<ou>/OU=<ou>/OU=<ou>/CN=<user> contains an invalid locale for attribute MsExchUserCulture: is-IS.
Note this is for most of my users, but not all. I used my test user and change the Languages of the Mailbox by using
  set-mailbox  –Identity test –Languages is-IS
but I don’t receive this error for that user.
His owa dir changes from English to Icelandic , but no errors.

I have used the install dvd to update and install all language bundles available.
Any ideas
Pall PalssonSystem administratorAsked:
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Pall PalssonConnect With a Mentor System administratorAuthor Commented:
This issue seams to be resolved by updating the language bundles.
Run the setup and download all language bundles available.
And as in my case i forgot to REASTART :)
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