Release 1.3 of Arcanum is now available from DriveThruRPG. As this update applies to both the PDF and the POD versions of the book, print copies of Arcanum will not be available for a short while as DriveThruRPG inspects the content file (called the bookblock) for formatting issues. According to their website, this should not take more than a couple of days -- but can take as long as a week depending upon vacation schedules and the like. Sorry for the disruption in POD availability.
The SRD files, available on this website, have also been updated to Release 1.3. Please get those if you are interested in such things. 🙂
The Errata file for Release 1.2 has been removed, as this release was never made available in print form. As such, if you have the PDF for Release 1.2, please update your file to Release 1.3 and you will have all known errata applied.