Removing PCD Personalization Data 
You can remove PCD (Portal Content Directory) personalization data for specific users or specific objects in your portal. Cleaning up personalization data may be necessary to solve problems that are related to a specific user or to a specific object in the portal.
You can remove personalization data for:
All objects personalized by all users
All objects personalized by a specific user
All users who personalized a specific object
You can also remove all unused personalization data. We recommend removing unused personalization data on a periodic basis. The removal of unused personalization data may impact portal performance while the operation is taking place. However, as a result of the cleanup, portal performance may improve.
Select .
In the Personalization Data tab, choose Remove.
Select .
In the Personalization Data tab, from the Search for drop down list, select User.
Type a search string and choose Go.
The Users table lists the search results, and an empty Personalized Objects table appears on the right.
In the Users table, select one or more users.
The Personalized Objects table lists the objects personalized by the selected users.
You have the following options:
Choose Remove User Personalization to remove all the personalization data for the selected users
Select objects in the Personalized Objects table, and choose Remove Object Personalization to remove the personalization data only for the selected objects.
Select .
In the Personalization Data tab, from the Search for drop down list, select Object.
Type a search string and choose Go.
The Personalized Objects table lists the search results.
In the Personalized Objects table, select one or more objects.
Choose Remove Object Personalization to remove the personalization data for the selected objects for all users.
Select .
Choose Remove to remove unused personalization data.