Bounce Rate for August messed up for anyone else???

I'm not sure whats happened, or if its an entirely freak occurrence, thats going on for Augusts bounce rate, its only at one site so that was recently redesigned and my site's bounce rate has hit a rock bottom of 5%.

Is anyone else having super low bounce rates? Normally the bounce rate is probably an average 35% or so for my niche.

 

How much traffic is that site getting? If your the only person going to it, sure its going to have a low bounce rate.

 

Yesterday was 200 uniques with a bounce of 4.57%

Other days got the usual 100-150 uniques

I think I know whats causing it and I'm talking to the developer of the add-on now about it to see if anyone else has reported the issue. (vBAdvertise using their JavaScript delivery system)

 

Just checked mine, and there's nothing fishy about it. Looks average to me.