Belle and Sebastian were great in their usual way, though I believe I slightly preferred the set list at MPP last year. But it was a delight: Stuart Murdoch's charisma, so many great pop songs, the always exciting "Arab Strap" stage invasion, etc. I did not notice any major sound issues other than maybe the mix swallowing/obscuring the strings. I did, however, hear a dude shouting, "Fix the sound!"
Julian Casablancas + the Voidz were fun at Union Stage, too. A short, loud, riff-heavy, pleasantly bizarre set. I wish he played a few from his underappreciated 2009 solo album, but I digress. I was not too impressed by Union Stage's line/id/ticket entry process, and it is a rather charmless crypt of a place in the basement. I prefer Rock & Roll Hotel.