Here is my hilarious tale. My comic files are coloured in photoshop in RGB, then placed in an RGB Illustrator file to get they balloons on, then I stick em up on the web. When I do a book, I just open the illustrator files in photoshop, convert to CMYK make some tiffs, stick em in InDesign and go away rejoicing. It's not a perfect way of doing things of course(it's not very professional). But on this occasion, the same printer who was happy for me to do this twice before has told me that the panel borders and text have to be 100% black (not the loony rich black that working in RGB gives you). I think they figure that it might not register perfectly. They managed it fine before but I imagine they were cursing me the whole time.
I can open up the RGB Illustrator files (with their placed, unlettered PSDs) in Photoshop, convert to CMYK, and convert all the blacks in the file to 100% with relative ease, but that leaves me open to trapping errors. I can't use the BPelts trapping plugin to fix this because I use a lot of rich greys that confuse it. As far as I can work out, I am going to have to individually edit every single file, probably by selecting the text in the balloons and the borderlines and painting over it with 100% black.
I don't see a way to rectify this that doesn't involve days of work. Just writing about it was complicated!
Ha ha ha! Aaaargh. This is particularly infuriating because this the the printer that did such a good job of books 6 and 7 at a pretty unbeatable price.