I have a RGB+NIR orthomosaic and when I export it, it seams to have some faulty encoding:
Every further processing step in gdal resports:
TIFFReadDirectory:Sum of Photometric type-related color channels and ExtraSamples doesn't match SamplesPerPixel. Defining non-color channels as ExtraSamples.
So there seems to be a problem in how the image is stored.
I'm running 1.7.3 build 12136
Best, David