This is the message I am getting from Norton (with my details removed.)
It is happening with IE9 but not with Chrome.
Category: Intrusion Prevention
Date & Time,Risk,Activity,Status,Recommended Action,IPS Alert Name,Default Action,Action Taken,Attacking Computer,Attacker URL,Destination Address,Source Address,Traffic Description
21/02/2013 12:37:43,High,An intrusion attempt by 64.237.61.69 was blocked.,Blocked,No Action Required,Web Attack: Malicious Image Request 2,No Action Required,No Action Required,"64.237.61.69, 80","ads.silverdisc.co.uk/www/delivery/lg.php?bannerid=1&campaignid=1&zoneid=1&OACBLOCK=86400&OACCAP=1000000&OASCCAP=1000000&loc=1&referer=http://www.theanswerbank.co.uk/AB-Editors-Blog/Question1218584.html&cb=ae479a1637
Network traffic from ads.silverdisc.co.uk/www/delivery/lg.php?bannerid=1&campaignid=1&zoneid=1&OACBLOCK=86400&OACCAP=1000000&OASCCAP=1000000&loc=1&referer=http://www.theanswerbank.co.uk/AB-Editors-Blog/Question1218584.html&cb=ae479a1637 matches the signature of a known attack. The attack was resulted from \DEVICE\HARDDISKVOLUME2\PROGRAM FILES\INTERNET EXPLORER\IEXPLORE.EXE. To stop being notified for this type of traffic, in the Actions panel, click Stop Notifying Me.