First off, can a mod please fix my spelling; it should be Updating Published Content not Updating Pulished Content, sorry
I started wondering whether or not it was simply a case of falling SERP indexing or outright removal from indexes and still don't have a good answer to the question. I do know however how many url's are in my sitemaps and according to google, not all of them are indexed.
Now this could be due to many reasons:
- the content simply sux
- some indexed content was lost during site software changes
- I didn't have proper re-directs setup to re-index the old content under the new url's
- the content is primarily made up of stopwords
- potential for duplicate content
...of course this may go a way toward explaining some of the forum content but still does nothing for the article content.