For amyone ising the Intego Antivirus suite on MAS's bewarned that the new 2013 version has problems with CS5.5 (al of it) if you use an external network drive. It won't load or save files to a network drive. Only local drives.
Abit of a major problem for a MAC only AV Sw company.Expecially as they claim to be business orientated!
Apaprently a fix is due "next week" so I would suggest waiting untill the end of April before upgrading to the Intego 2013 AV suite.
This has now been sorted with an upgrade. It all works well with CS.