This is a small update to Wallpaper Changer which adds an extra option. You can now tell it to not re-calculate the desktop size every time it changes the wallpaper.
The problem I was having is that I'll sometimes remote-desktop into my machine, and if it happens to change the wallpaper when I do, it'll pick up the wrong size (it'll be the size of the remote desktop window). So I made this option to disable the desktop-size recalculation.
My settings are stored in a simple binary serialization of my "settings" class, so this means that and old settings won't be remembered when you start up the new version. I guess this is something I should work on, but it's not a priority for now :)
Anyway, you can download version 1.2 here. Enjoy!