Hi Richard,
Another issue with the colord V4 AdobeRGB1998 profile is that it doesn't
match the Adobe specification - the white point should be D65 (4.2.4),
while your V4 profile has a D50 white point, to comply with ICCV4.
This may put the profile in dubious legal waters, given it's name
(i.e. it's claiming to be complaint with the Adobe spec., but isn't).
Cheers,
Graeme.