Recently I have updated display name in AD for some users and have run the full synchronization in my sharepoint server 2010. When I do this the user names get updated in my user profile service where as the same is not reflecting in people picker column at list item level for some users. Here is a example.
I have a people picker field in my list that shows old display name.
When I click the user name it moves to the profile page where updated name is displayed.
There is a solution that the user could be deleted from site and added again but remember this has to be done for a couple of users(we are maintaining more than 6000 users) and permissions has to be given again which is time consuming. Any other ideas?