CNN/Gallup/USA Today gives Bush a bounce?

"The survey showed Kerry losing 1 percentage point and Bush gaining 4 percentage points from a poll taken the week before the Boston convention."

I can understand Kerry sticking, but a four-point bump (with an MOE of +/-4) for Bush? His entire week consisted of clearing brush and falling off a bike. Damn you, Karl Rove, you bedeviling bastard!