Site Safety Symbols disappear when using Google search

Site Safety symbols have disappeared from my internet browser when using Google search.  In some instances the symbols have reappeared after visiting a specific site and returning to the Google search page.  The Norton Site Safety symbol is still present on the Toolbar.

 

My system is a follows:

  Windows XP Home Edition: 5.1.2600 SP3 Build 2600

 

  Internet Explorer 8:  Version 8.0.6001.18702

 

  Norton Internet Security 2009:  Version 16.8.0.41

 

This problem started approximately 2 days ago.

 

This is my first post so may be handling the process incorrectly.  Please advise.

 

 

[edit: Clarified subject.]