Spells: Casting while "out of range"

[uygi]

My understanding: The initial range check to start the cast is done client side. At the end of the cast it's sent server side, and the server will check it then. If you're lagged or your client misreports the target location (there are a number of issues that can cause this), you'll end up with this problem. Of course this also happens if the target simply moves out of range during cast. And your sig is great.