Updated FML:
MinecraftForge/FML@97269a5e3dc0a0e2e1a79183f9f5f2ee120e90bd Decode the file URL. Hopefully will make things work more..
MinecraftForge/FML@d4d522c5978ecd7a9195977b3327b441901bb5b4 And don't forget to remove the test code