This is a major milestone for various reasons. First and foremost, it is the first public version of Zandronum and thus ends the awkward situation where most of the servers are still running Skulltag 98d even though Skulltag has been officially declared dead by its creator and the community migrated to Zandronum.
The development of this release started almost two years ago under the name 98e. What was originally intended to be a small bug fix release grew into much, much bigger proportions. The two most striking differences changing our development model are the opening of the source and the creation of a Skulltag fork named Zandronum.
So head over to http://zandronum.com/downloads/ and check it out, a new era of online Dooming has just begun!