I'm not getting the warning sign yet, but that banner advert at the top of the page has started doing what it did yesterday, just going round and round without loading the advert..... I'll keep an eye on it.
I've had 5 warnings in 6 minutes (16:13 - 16:19 today). Details:
Attacking computer: ads.silverdisc.co.uk
Message on Norton warning: Web Attack: Malicious Image Request 2.
Since the last warning, at 16:19, I've had no warning from Norton.