Hello Graeme. I haven't tested the version 1.6 but a few days ago I tested the 1.5.1 version on a W8 Pro x64, with a Colormunki, and I don't see any issue on my final prints. Could be that my installed CM driver belongs to an outdated version. When you publish the 1.6.1 I will test it and I will comment here my results as Colormunki user. It is recommended to update the system CM driver on any new release or it is not necessary? Thank you very much ! Regards, Xavi. -----Original Message----- From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx] On Behalf Of Graeme Gill Sent: Monday, September 23, 2013 7:01 AM To: argyllcms@xxxxxxxxxxxxx Subject: [argyllcms] Re: Argyll 1.6.0 - Shallow blacks on Epson 3880 Xavi wrote: > Then, the recommended solution, for users of Colormunki, Is to > drowngrade only the CM driver to 1.4 version (if it is possible) or to > downgrade the driver and the whole application to the 1.4 version? That's a reasonable short term solution. I hope to be able to release a V1.6.1 to fix it properly though. Graeme Gill.