I found that File Insight has a bug in signature check operations. It can't determine whether the .msi archive is signed or not, thus it can generate the irritable issues like flagging Microsoft Office installers with 'Bad' status.(Here is example picture http://img810.imageshack.us/i/fileinsightbadacc.jpg/).
Can you fix this?
P.S. In Norton 2012 this issue has been fixed.