Hi Mike, I've noticed a processing issue with the latest versions. Pretty sure it started with the first 2026 version, and it goes away when I revert to 2025.105.

Pure white image, 255,255,255, is being processed to a very light green tone. Only just visible in print preview and on print, but it's there.
See attached screengrabs from my Print Preview, one of them I boosted with a levels layer to show the issue more clearly.

There's a pure white border from image to corner marks, which does not have the green tone.

I can't share the image(s) I'm printing. Just test with any image with a white background. Most of my print output files are in ProPhotoRGB

Epson P9000 and P9500 - the issue presents on both machines
I'm using a range of papers, with custom profiles that have given me no issues for years.

The issue is not present in 2025.105 and earlier, but shows up in 2026 versions without any changes to settings, media and profiles. I can print from 2025.105 without problems, then save the job. Then I install any 2026 version and recall the job. I print and the issue shows up in the print preview.

I really only need to know the image profile was Prophoto.  I do see something that might need a slight tweak to force LCMS to do higher precision color conversions (full precision vs high precision).  White seems to end up at 254,255,254 in some cases when using the faster "high precision" method.  That might be what is causing a tiny color cast in white.  Surprised you can even see a 1 RGB change near white but I suppose depending on the printer profile it could cause the printer to put a tiny amount of ink on the paper.  I'll release a 2026.103 and we'll see if that fixes it.

Regards,
Mike