The payroll tax updates were the only major changes in version 4.59. However, we have had several other releases over the past months that have added a number of new features including the ability to track livestock weights in Fund$. Additionally there have been a number of improvements in the mapping area of Trac that make the displaying of maps much quicker. Also, Farm Site has had a number of added features.
You should be getting a newsletter in the mail in the near future that gives a little more detail on added major features, also we'll try to get a spot set up here on our website that lists the features of each update.