OK, this happened for the first time in ages today. The advertiser is always Berger. It doesn't seem to have a right-clickable link. I've taken a screen shot, but I can only post images from an external link, and I don't use a pic hosting site.
The best I can describe it is that on the very first pprune page, it sits over, and blocks out the thread title 'Rumours & News' plus some of the surrounding text. Hope this helps. If you can temporarily allow me to post a .jpg file I'll post the screenshot.