I'm pleased to announce the release of ArgyllCMS V1.3.4. This update adds new features as well as containing minor bug fixes. Amongst the changes are: Support for the X-Rite i1 Display Pro and ColorMunki Display colorimeters (i1d3). While these instruments seem to be quite good without specific display calibration, they can benefit from it, so a new type of Argyll colorimeter calibration file has been created (CCSS) to support the type of calibration these instruments use. ccmxmake has been renamed to ccxxmake and support added for creating CCCS calibration files using a spectrometer instrument. A new tool called i1d3ccss allows the calibration files that come with the instruments to be translated into CCSS files and installed. A CRT calibration is provided, something that is missing from the manufacturers set. Non-1931 2 degree observer support has been added for these instruments, taking advantage of the type of calibration they use. The gamut finding code has been improved so as to deal more robustly with small and odd shaped device gamuts. The Spyder driver on Linux has been tweaked to work around device and Linux bugs, and may work more reliably through USB hubs. Printtarg has been modified to allow variable patch size for the DTP20. An option has been added to colprof to allow setting the default profile rendering intent. The full list of changes is in the log.txt file as usual. Graeme Gill.