I was playing with the new patch as Shaco, when all of a sudden when I did my ultimate, an automated error message popped up in all chat (It was in-game and no one had typed it). It said something about "error%#/buffs", I'm guessing that it was possibly caused when I had both blue & red buffs on, while doing my ulti.

It looked like this

: Error !%#/buff1047

For those of you wondering why I had not provided evidence, was because the new update does not support "screen shooting", and thus, the image in paint ends up as a black screen.

P.S. I like the new visuals Riot, keep it up! Especially with the remade Ashe