Updates or Patches for Altiris 7.1

Hello All,

     I have been trying to manage our Altiris 7.1 environment that was installed by my predeccessor.  I have been able to kepp the the Windows 2008 servers up to date with patches but then wondered if Symantec rolls out any patches or updates for the Altiris platform that I should be installing.  Is there any article or info if this is the case?  Thanks for helping a newbie.