Can't launch Minecraft 1.6.1 (Found multiple arguments for option ['username'], but you asked for only one)
I can't launch Minecraft 1.6.1 using new launcher, I'm logged in with Mojang account.
Minecraft 1.5.2 works fine.
I can't launch Minecraft 1.6.1 using new launcher, I'm logged in with Mojang account.
Minecraft 1.5.2 works fine.