Since about a week or so ago, NOD32 3.0.657 has been extraordinarily slow when scanning CHM files (help files). This is especially prevalent with the AutoIt help file since it contains several thousand compiled html files. And it seems to rescan this file each time I browse to a new page in the contents panel. What's the change and why? This is so very very annoying. And why doesn't NOD32 do some sort of optimized realtime scanning so it doesn't rescan the same files over and over again? I thought it did this already with some sort of MD5 or CRC hashing (ie the "Optimized scanning" option which it seems to happily ignore)?