While it took two and a half years for DragonFlyBSD 6.4.1 to materialize from DragonFlyBSD 6.4, only one week passed since that recent v6.4.1 release to now see v6.4.2.
DragonFlyBSD 6.4.2 can now be downloaded from DragonFlyBSD.org. Given the short time since v6.4.1, there are very few changes in this release.
DragonFlyBSD 6.4.2 fixes a kernel panic and user-process corruption bug, fixing VirtIO block device cylinder count reporting, several FDISK fixes, and other fixes. The DragonFlyBSD Digest noted DragonFlyBSD 6.4.2 will primarily help out if you are using QEMU, running the Chrome/Chromium web browser, or using IPv6 networking.