Exchange 2003 to 2010 migration

Hi
I'm just completing an Exchange 2003 to 2010 transition, all seems to have gone well but we're seeing a shared calendar issue where users on 2010 accessing a 2003 users calendar only sees entries as "busy" or "tentative" but from 2003 to 2010 they can see full details, I migrated my mailbox yesterday to 2010 and I can still see all calendar entries on 2003 users but my colleague with the same domain/exchange permissions can only see "busy" on 2003, stumped......
Jon CarneyInfrastructure EngineerAsked:
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"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Jon CarneyInfrastructure EngineerAuthor Commented:
You can ignore this, just found out that my colleague had upgraded to office 2013.......
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