Is there a reason why the on-screen calibration target in 4.0 shows green and magenta patches, whereas the BMP file version is greyscale? This is what I see on my monitor:
This is what the BMP file looks like:
NeatImage Pro Plus 5.0 + dual Opteron 244 + Windows XP SP2 + FreeBSD 5.2
Ah. heheh. Actually, I've found that colour inkjet printers will still use all available inks, even when printing greyscale images (unless you have a specific mode in your printer driver to only use the black ink). Anyway, I wasn't sure if the magenta and green was intentional.
Is there any advantage to use the colour patches instead of just the grey ones?
NeatImage Pro Plus 5.0 + dual Opteron 244 + Windows XP SP2 + FreeBSD 5.2
Yes, there may be some advantage, in some cases. Color patches may produce a more realistic noise pattern with certain digital cameras and resulting noise profiles could be a bit more accurate in such cases.