I haven't seen this mentioned yet so I thought I'd get in this little "extra" which some may get a kick out of. From the Manchester concert CD, after Paramore finishes playing "That's What You Get" (about 1:20 or so left on that track), you can hear about 15-20 seconds of guitar playing. The instrumental is the opening to John Mayer's song "Vultures". Hayley comments "Oh yes. That's good stuff."
A little nod to Mayer after he recommended them on his blog? Indeed.