Comment 16 for bug 368342

Unchecking the 'Use iTunes compatibility mode' is not enough to get rid of those error messages. Apparently Max still passes this information to the script. However, removing all the code that deals with changing track properties from within iTunes is the best way to go, as this old compatibility feature is not needed anymore (see comme #11).

For the one who wants to try, here is a corrected script you can put in the Resources directory inside Max, it should work ok to add converted files to iTunes. Tested on OSX 10.7.2, iTunes 10.5 and Max 0.9.1.