For a week or so moving between forums on this site using my iPad results in another PCA screen, advertising a magazine with PCA 200 Top Tips for 2012, appearing for a half a second before the actual Forum page opens.
Using IE, FF, Safari or Chrome on any of my other computers (including Macs) is fine
As my Computer reading needs have changed to more of a component/modding orientated magazine it's been a while since I have read PCAdvisor. Like you I caught the ad and as it is free I have downloaded it.
The real annoyance about visiting the PCA site on the iPad is the nuisance of the ads which means it is slow to fully load compared to nearly every other site I visit.