Andy56 - 6:23 pm on Jan 17, 2007 (gmt 0)

I am either suffering from this penalty or something similar.

All my new pages since August 2006 appear to have been hit. When each page is first included in the serps I receive what I would consider to be a normal ranking. Then after a period of days or slightly longer the page will bomb. For example from page 2 to page 24. Sometimes I have two pages on a similar subject. This could be a review and a video guide. Both pages will bomb but one page could end up in say position 70 and the other in position 240.

Pages before August 2006 appear to be unaffected. I haven't checked them all as there are too many. There is nothing really different about the pages I have written before or after August 2006.

Before Christmas I requested reinclusion. This appeared to have been granted as all my rankings returned. A week later they all bombed again.

I consider the site to be white hat. I pay no real attention to keyword density, but don’t think it is an issue. I just write the pages and do nothing special in terms of optimisation.

I have read various guidelines and cleaned up a few minor points, but to be honest I cannot find much to clean up.

My latest page to bomb was cached by Google on 6th January, but didn't bomb for another 9 days. Not sure what this means.

The site has been online since 1999. It has thousands of pages - all original content. It has price comparisons on product pages but little else in the way of banners or other advertising. I run an RSS feed, but other than that do nothing in terms of linking.

Absolutely no idea what is causing the problem. Didn't even notice until late November as I never paid much attention to rankings before now!