I have an HP M1212nf MFP, set up as a network printer. When I print anything to it from my Rawhide desktop, it comes out kinda with the colors inverted - if I print something that should be black on white it comes out white on black, if I print something from allrecipes.com it just comes out as a solid black block. Printing to the same network printer from an F14 laptop works fine, so this is something Rawhide-specific.

I note someone reporting something similar with Arch upstream:

https://answers.launchpad.net/hplip/+question/133425

if that helps. No idea what's causing this. To try and reproduce, try going to http://allrecipes.com/Recipe-Tools/Print/Recipe.aspx?RecipeID=10813&origin=detail&servings=24 and printing the page.