This week I've set aside afternoons for learning some more about QT, and answering some of the key questions we set ourselves. I built a little GUI app today, and confirmed that SVG images can be used for icons; I also cross-compiled it on Windows 7, and it works there too. Testing the app on XP, though, I ran into the same dependency issues as before; with a suitable collection of DLLs I could get it to run, but I couldn't get any SVG images to show up. I think deployment on Windows is going to be a rather difficult issue; we need to get it solved before we go any further. However, I'm hopeful that we can have a fully SVG-based GUI, which is great.