lists with user null in db

Hi everybody :),

Maybe you know the problem already from the users list. It can be a 
problem to create a query with a list without a user id. This problem 
occurs only as normal user and not as admin.

I found out, that the MITList of a report has no user id, because 
ReportBridge.getMITList loads only the IssueTypes, but ignores the user.

Is it a solution to ignore all lists with user null by removing them 
from the drop down?

cheers
Johannes