One of my complaints with Paint.NET (of which I don't have very many!) is that when you go to File->Print ( :Print: ) it uses the Windows XP Photo Printing Wizard, which sucks IMHO. My main complaint with it is that you cannot print an image in actual size, probably because that wizard was designed for photos, which not all graphics are! Even MSPaint can do this, so why not Paint.NET? Another thing is my laptop has problems with printing in MSPaint (probably due to the widescreen monitor) forcing me to paste it into a program like WordPad, which is very inconvenient!
So I suggest a simple feature: provide printing support with a standard Print dialog box like other programs do. That is all it will take.