New folder creation after name change causes inbox to open very slowly

Here is my problem.

I know that after a name change is performed on a particular user, that person will experience slow access to his/her mail database until such items as forms, view, agents, etc., are updated with the new user name.

My dilemma is this:

I had misspelled a new user’s name when I was registering it in the Domino Administrator. I went back and corrected it, all done before the new user started working for us.

His mail file will open just fine until he creates a new folder. The inbox will take forever to open after he creates the folder.

This is a new mail database with no folders created prior to the new folder.

Any ideas as to why this happens?