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flanok - 9:32 am on Jun 25, 2011 (gmt 0)
OK I have another theory,
but I need some input as I am not 100% sure of how cached pages work within Google.
My website is in 4 sections
1/ Home page General content (no Ranking Change) | 2/ Catergories of content (no Ranking Change) | 3/ Detailed pages Of Catergories ( 30% gains 70% losses in ranking) (mixed bag) | 4/ Very detailed information about the detailed pages (no ranking change these pages would probably rank just from the title tag and url as they are very specific and have none or very little external links)
As you can see it is only the 3/ "detailed information" pages (that also delivers the most traffic) that are seeing changes through the latest Panda update with 30% of pages gaining and 70% dropping.
In my opinion the content is all written by me, so I think it is consistant throughout and pretty good, although my grammer is not the best.
The important point is this. The "Very detailed" pages link to the "detailed pages" on an average of around 8 to 1. (only specific "very detailed pages" link to the related "detailed pages", gaining around 8 internal links each).
What I have noticed is that the cache for many of the "4/ Very detailed pages" shows a "page can't be found" message, even though the page is still in the index and ranks similar to before.
So my opinion is, I am losing internal link value whilst I wait for google to re-cache these pages.
This seems to be confirmed by comparing the "detailed pages" pages that have improved and seeing the "4/ Very detailed pages" still have a cached version of pages that links to them and the opposite.
The "detailed pages" pages that have losses, appear to have a large quantity of "4/ Very detailed pages" that have lost their cached version and show the "page can't be found" message waiting fot Google to revisit.
Unless I dont understand how cached pages work in Google and what I see is not what Google actually uses, I believe that when Google spiders revists these pages and reaches them I will regain the internal links and therefore rankings.
Is it possible that many of you out there have not checked a sample of cached pages through the levels of your sites, and it not a case of bad content but lost internal links during this interim period, waiting for pages to be re-cached.
My opinion only