As part of trying to keep things tidy in the filesystem we've removed all the old extended ACL entries on files located on the download/archives servers. These were used to help us bypass limits on group membership imposed by NFS.
What does this mean for you? Hopefully nothing, everyone should be using JIRO or JIPP which removes the need for these extended permissions.
If you are a committer that is part of more than 16 projects, and you are responsible for builds/uploads let me know, and we can discuss the options.