Mailing list archive clean-up: Since the inception of common-lisp.net, hosting of mailing lists has been part of our service offering. For a long time, two or even three mailing lists were created with every new project. Many of those were never used. Today, we cleared out all mailing list archives which didn't have any messages in them and which are not in active operation.
The Subversion repository maintenance window completed ahead of schedule at 18:00 on June 1st instead of taking the better part of the weekend. During this maintenance window, Subversion repositories were upgraded to the latest standard (1.9). Some repositories were stored in backward compatible formats as far back as 1.1. With the migration, repository access should benefit from performance work done in the server component. Other features that become available with this maintenance include the storage of merge-tracking information.
The site has always been running its own Trac setup, because we were one of the early Trac adopters. While running our own packages, we've also been lenient to install plugins. Due to improved support in both Trac as well as Debian packages, we were able to move to a full-standard setup.