RISC OS Open have announced that Castle have given the official seal of approval to RISC OS 5.16, the new version of the shared-source OS. The most prominent feature in this new version is a fix for the much-discussed year 2012 bug, where IYONIX computers would mistakenly read their real-time clock on startup if it's an odd-numbered decade.
The new IYONIX pc ROM can be downloaded free of charge from the ROOL site, in either flash programmer or softload form. ROOL advise that the ROM image is believed to work in softload form on all IYONIX versions of RISC OS from 5.10 or later. In flash programmer form, it should work from version 5.07 or later.
To avoid any unforseen compatibility issues with third-party software, it's advised to at try out the softload at least once before running the flash programmer tool. Just remember that the using the softload won't fix the year 2012 bug (and can even result in a jump to 2110) - the only way to fix the year 2012 bug is to use the flash programmer.
Update: ROOL have now added to the release announcement a human-readable list of the changes that have been made since the last official release (5.14).