Tons of little changes (https://github.com/letoram/arcan/releases/tag/0.3.1) and optimizations to the engine as such, the big one, however, is a new built-in theme for desktops (shown in the demo video below) called simply AWB (or Arcan Workbench).

Win32 builds (as well as source tags etc. for Linux/BSD users) are up at the Github release page (yes, we’ve given up on sourceforge). Updated core package will be uploaded in a few days, you can also grab/extract cores from the 32-bit retroarch megapack at the libretro site.