Nothing too worrisome in these numbers. Bambi got a slight bounce after Hillary! dropped out. The numbers are already settling back down.
Add to that the fact that Quinnipiac is pretty good in the Northeast but terrible everywhere else, and this particular set of numbers means pretty much zero.
Obama has a slight lead right now just like virtually all Democrat candidates do in the summer. If McCain plays this right, and if the GOP-leaning 527s carry his water for him, he still has an excellent chance of winning this in November.