Just looking for some clarification...
I checked my new version 7 install and verified that indeed, advanced heuristics on file execution are enabled by default.
I assume that the algorithms used for these choices (beginging with version 6) were greatly improved over version 5? I remember from the old NOD32 forum this being a big, sticky issue back then. Advanced heuristics on file execution were definitely not on by default back then. (Based on this thread, sounds like it's now an important thing to leave on!)
BTW, the help file bundled with version 7 explicitly says that advanced heuristics on file execution are disabled by default. You might wish to correct it...