I've recently started using Paint.NET and I've been very impressed with its features. I've run into some problems working with large images though. Specifically, this file has caused me some problems:
http://visual6502.org/images/68000/Motorola_68000_die_20x_1a_top_10000w.png
It's a 10000 x 11299 pixel PNG image. I want to be able to zoom in quite far in order to look at some of the fine details, and make some notes on the image while I go. Unfortunately, as I read elsewhere on this forum, it seems that Paint.NET currently doesn't support a virtual canvas size greater than 32768 x 32768. On this image, that means I get a maximum zoom of 290% before I can't zoom in anymore, which isn't very much. Right now I'm having to use the "Windows Photo Viewer" to actually view and zoom into the image, while making the notes zoomed further out in Paint.NET, which is a bit cumbersome.
I know this is probably non-trivial to fix, but it would be fantastic if you can remove this barrier on the maximum virtual canvas size.