>Only as long as they also match the current version of the program. ZoneAlarm seems to use more than just the name. Any time I do a Windows Update that changes the version number of an installed program that has been granted axccess through ZoneAlarm, it asks if I want to allow access to this "new" program.

Of course, but most users will allow access, being unaware of versions, md5, and so on. IMO, is very hard to create a perfect firewall, mostly because of users.