[RichieBoy67]

Originally Posted by shimei

I think the Google algo. penalizes for all those 404 errors. After a year I still have over a thousand after changing forum solutions. And this is despite submitting a sitemap. Google seems to be reluctant to reindex the site. At least with mine... I consider a year pretty reluctant.

Are your new urls indexed? If so then you are reindexed. it is just that your old urls have not been removed. Chances are some of them are linked elsewhere. be sure to check in webmaster tools those erros and where they are linked from.

if you want your old ones removed you can submit them through webmaster tools and block them with robots.txt.