Yahoo is tricky with their ads. I tried to quash them all and got a similar error. I wound up using CSS to whack the ads.
Here's the site CSS I use:
Code:
/* personals, soapcity ad (forms) */
form[action^="http://rd.yahoo.com/"],
form[action^="http://us.ard.yahoo.com/"],
form[action=""][name$="SoapCity"],
form[action=""][name^="728x90"],
form[action=""][name^="300x250"] { display: none !important }
/* text banner */
div#ymadbn { display: none !important }
/* mail: logout page page */
body[bgcolor="#ffffff"] tr[bgcolor="#eeeeee"] td[align="center"][valign="top"] p table[bgcolor="#cadaf8"][width="250"][cellpadding="4"] tbody { display: none !important }
/* "Sponsored Matches" at the bottom */
body[bgcolor="#ffffff"] center p table[width="750"] td[width="540"][valign="top"] table[width="100%"][cellpadding="2"] td[valign="top"] table[width="100%"][cellpadding="1"][bgcolor="#999999"] { display: none !important }
/* yahoo search - sponsored results: updated */
div#yschres div.yschspns { display: none !important }
/* yahoo directory - sponsored results */
div.ydirspns { display: none !important }
/* floating iframe survey prompt */
div#yad_win { display: none !important }
/* sponsored results */
body div#results div[class="st sr"]:first-child,
body div#results ul.ovr, body div#east { display: none !important }
/* ads above grid */
body > center > p { display: none !important }
/* grid ads */
div#ytvMainBody > div.grid_cont ul.grid#oGrid li.adRow {
display: none !important
}
/* ads above programming info */
body > center > p { display: none !important }
/* programming info ad and sponsored links */
div.tabs div.adContainer,
div.tabs div.tabContainer div#masterdiv { display: none !important }