Hi all, We're proud to release yt version 2.5.4. This is a scheduled point release that includes all bug fixes identified and fixed since the release of 2.5.3 on June 3. Additions, changes and bug fixes include: * Considerably (10x+) faster kD-tree building for volume rendering * System build fix for POSIX systems * Fixing domain offsets for halo centers-of-mass * Removing some Enzo-specific terminology in the Halo Mass Function * Addition of coordinate vectors on volume render * Updating RADMC3D export code to support FLASH * Pickling fix for extracted regions * Addition of some tracer particle annotation functions * Better error message for "yt" command * Fix for radial vs poloidal fields * Piernik 2D data handling fix * Fixes for FLASH current redshift If you are using the stable branch of yt from an installation script, you can upgrade using "yt update" or "yt update --all" to upgrade your full dependency stack. If you are using the development branch, you may already have these fixes. A tarball of this release has been uploaded to the Python Package Index (PyPI). While originally a 2.5.4 release was not planned, developments for 2.6 have been delayed. The next scheduled release will be on August 1, and will be version 2.6. We are hoping to include a unification of the Boxlib frontends, compatibility with Python 3 (and embedding inside Blender) and other usual improvements to the yt codebase. Documentation for this release can be found at: http://yt-project.org/docs/dev/ Thanks very much, Matt, on behalf of the yt development team