Hi all, We're proud to release yt version 2.5.3. This is a scheduled point release that includes all bug fixes identified and fixed since the release of 2.5.2 on May 1. Additions, changes and bug fixes include: * yt can now export to RADMC3D * Athena frontend now supports Static Mesh Refinement and units ( http://hub.yt-project.org/nb/7l1zua ) * PlotWindows now have a set_font function and a new default font setting * Colorbars less likely to extend off the edge of a PlotWindow * Clumps overplotted on PlotWindows are now correctly contoured * Allsky projections and HEALpix camera now correctly use four channels (RGBA) * Many fixes to light ray and profiles for integrated cosmological analysis * Improvements to OpenMP compilation * Typo in value for km_per_pc (not used elsewhere in the code base) has been fixed * Enable parallel IPython notebook sessions ( http://hub.yt-project.org/nb/qgn19h ) * Change (~1e-6) to particle_density deposition, enabling it to be used by FLASH and other frontends * Addition of is_root function for convenience in parallel analysis sessions * Additions to Orion particle reader * Fix long-standing bug for plotting arrays with range of zero * Fixing TotalMass for case when particles not present * Fixing the density threshold or HOP and pHOP to match the merger tree * Reason can now plot with latest plot window * Adding option to have interpolation based on non-uniform bins in interpolator code * Issues with VelocityMagnitude and aliases with velo have been corrected in the FLASH frontend * Halo radii are calculated correctly for domains that do not start at 0,0,0. * Halo mass function now works for non-Enzo frontends. * Bug fixes for directory creation, typos in docstrings 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). This release includes a total of over 150 changesets, contributed over the course of nearly 40 pull requests by over a dozen individuals. The next scheduled release will be on July 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