As far as i know sys.dm_db_index_usage_stats should have one record per table and index but in one of my server this count is mismTHIS IS CLEARLY SPAMans this DMV doesn't have records for every index/table.
there was issue in sql 2005 which can be resolved by trace flag 2330 but i think this has been fixed in sql 2008
i am using sql 2008 but still i can see same issue.
Another question is , if i do dbcc traceon (2330,-1) , does it "STOP" to gather the information OR "START" to gather the information ?
I work only to learn Sql Server...though my company pays me for getting their stuff done;-)