NIS2010 update on December 15 lets crash Firefox and IE 8

After December 15 NIS2010 autoupdate  on Windows XP SP3

 - lauching of Firefox crashed with Aplication error - memory could not be written

 - download of any file initiates crashing of IE8 tabs with recovering the page

stopping of Smart Firewall allows to download partly - when I tried to get support from Symantec chat even the Symantec Advanced Chat exe crashed while trying to comunicate with IE8.

 

By the way - the same situation was happened few months ago when NIS2010 was launched - I got several support sessions with Symantec and then with Symantec update everything was fixed. NOW situation are back - something wrong are in the latest update !!

 

Help from Symantec needed !! (I can't get supported due the errors with chat exe)