The issue does seem in some way related to which ICC profile is used, and also has something to do with the colour sliders not releasing mouse focus, but it is not possible to avoid the issue by using the text boxes to enter CMYK values instead.
My suspicion is that there's a problem with how Inkscape tries to adjust the colour when using certain profiles.
Does anyone have a Fogra 39 ICC profile that works with Inkscape? The one from Adobe won't work.
Still a current bug for Inkscape 0.48.0 r9654
The issue does seem in some way related to which ICC profile is used, and also has something to do with the colour sliders not releasing mouse focus, but it is not possible to avoid the issue by using the text boxes to enter CMYK values instead.
My suspicion is that there's a problem with how Inkscape tries to adjust the colour when using certain profiles.
Does anyone have a Fogra 39 ICC profile that works with Inkscape? The one from Adobe won't work.