I hate to keep waffling on like this, but I just caught the page that causes the gator one to pop up. it is http://z1.adserver.com/w/cp.x;rid=25;tid=2;ev=1;dt=3;ac=7;c=817;
I was switching between pages on the board when I saw this pop-up, caught the z1 on the top line. It then closed itself and up come the please wait page, and then gator. No other program was open, and I cleaned my system with ad-aware this morning.
The source contains a link to the webpdp.gator site that causes gator to come up. I will post the source at the end. It opens itself, and then causes it to close after calling the gator ad to it. Sometimes when I click on the link it simply trys to close itself, once it opened a registry mechanic ad (an ad I have never seen before).
I just recleaned my system with ad-aware, ran the source as html and up came gator. Before I ran ad-aware the source would not cause gator to pop-up. I guess it reads the cookies it creates so it doesnt pop up so often or something.