Dear CrystFEL users and interested crystallographers, CrystFEL version 0.6.1 has been released. The most interesting changes in this version are the new "prediction refinement" stage in "indexamajig" and improvements to the scaling and post-refinement program "partialator". There are also a couple of new indexing methods. The prediction refinement stage improves the quality of spot prediction and hence the initial parameter estimates of the spot partialities. It is also able to update the central beam position. The improvements to partialator include a significantly more stable scaling procedure. Partialator is no longer considered experimental as of this version, so please try it and send feedback. With the combination of this and the new prediction refinement, many users are already finding significant improvements in data quality. See the release notes (link below) and the updated tutorial on the CrystFEL website for more details. The new indexing methods are "asdf", which is an algorithm built into CrystFEL which therefore requires no external programs, and "mosflm-cell" which uses the prior unit cell algorithm in recent (7.2.0 or later) versions of mosflm. "mosflm-cell" is now the default behaviour for mosflm - if it doesn't work for you, explicitly specify "mosflm-nocell" to restore the old behaviour. In addition, there are many smaller improvements, new features and bug fixes. Thanks for all of your past and future feedback and contributions, and your continued use of CrystFEL. As ever, please contact me directly if you would prefer to be unsubscribed from this mailing list. CrystFEL website: http://www.desy.de/~twhite/crystfel Release notes for version 0.6.1: http://www.desy.de/~twhite/crystfel/relnotes-0.6.1 CrystFEL tutorial: http://www.desy.de/~twhite/crystfel/tutorial Tom