Signature generator needs a complete overhaul to be compatible with the new armory. Unfortunately no XML feed is available on the new Armory at this time and official Blizzard response on the issue is "soon". Blizzard has made it clear however that the new Armory will likely be supporting JSON so more advanced signature generation features will be possible.

Basically the script is old, we need to re-write one from scratch once the feed for the new Armory goes public and an API is available.