Do you know what the new AexNSChttp.exe and AexNSChttps.exe files (under ".../Program Files/Altiris/Notification Server/nscap\bin\Win32\X86\NS Client Package") are for?
What is the difference between AeXNSC.exe, AeXNSChttp.exe, and AeXNSChttps.exe?
About the SMA installation package:
AeXNSC.exe - package doesn't contain pre-defined NS URL and SMA settings.
AeXNSChttp.exe - package contains NS URL HTTP address and other settings from the Communication profile.
AeXNSChttps.exe - package contains NS URL HTTPS address, certificates, and other settings from the Communication profile.
In some cases, in order for the AeXNSCHTTP.exe and AeXNSCHTTPS.exe files to be updated as well, re-save all the communication profiles in use (if you have more than just the default one) under Settings>Agents/Plug-ins>Symantec Management Agent>Symantec Agent Communication Profiles. Change something (uncheck/check box) and save. You should be able to see in Trace logging that these files were created.