slack: user profile URLs seem wrong

[eaburns]

I am seeing this:

User{
		ID: "U3LL7MLKY"
		Nick: "eaburns"
		FullName: "Ethan Burns"
		DisplayName: "eaburns"
		PhotoURL: "https://secure.gravatar.com/avatar/6af1328898347e14ed8958dc58952d2f.jpg?s=192&d=https%!A(MISSING)%!F(MISSING)%!F(MISSING)a.slack-edge.com%!F(MISSING)7fa9%!F(MISSING)img%!F(MISSING)avatars%!F(MISSING)ava_0008-192.png"
	}

It looks like the PhotoURL field has bad formatting.