Yes, I know that Qimage does not support CMYK files and that is perfectly fine, I am not asking for CMYK support. Actually it is almost the opposite that I want.

This old post from Ernst http://ddisoftware.com/tech/qimage-ultimate/image-reading-error/ is quite similar to my current situation, but he did not get an answer.
My situation:

Some clients send CMYK files even when we instruct them to send RGB, sure some don't even know what the difference is. That is part of our job, we make a quick jump to Photoshop, convert it and we are ready to print in Qimage. The problem is that sometimes we miss one CMYK file in the middle of a dozen RGB files and Qimage seems to handle it. It does not warn about it, it displays the thumbnail and even prints it... but with weird colors.

It would be better if Qimage somehow warned us that the file is CMYK and can not be printed properly. It does that with CMYK Jpegs, but not with CMYK Tiffs.

Another thing I noticed is that an UNTAGGED CMYK is automatically associated to sRBG.icm and that is displayed on the bottom info bar leading us to think it is an RGB file. See the attached image showing the same file opened on Qimage and Photoshop.