I do not need a solution (just sharing information)
AV Engine Update – January 15, 2013
Symantec will post an update of the AV Engine in Multiple Daily Virus Definitions on Tuesday, January 15th 2013, US Pacific Daylight Time.
The AV Engine version will be 20121.3.0.76 or greater. This release is a regularly scheduled release that includes efficacy enhancements and does not target any specific customer or known issue. The release will cause the size of definitions to temporarily increase.
Prerelease test definition files are provided for vetting this update on test systems. (as these are prerelease definition files, they should not be deployed to production systems)