Today my NOD updated to 1.1550. I was curious to see what does it contain and I saw only advheur0.nup engine has been updated, not engine2.nup as usual. The update was about 400 kb. Then I saw my AH engine is 1.029 now (20060519). Can anyone tell me what is new in it? A new heuristic engine for a specific family of malwares or what?