The number of 404 errors on the server has gone up drastically in the last 45 days (from 2000 to 9000). this is after I have made no changes to my permalink structure or .htaccess. the 404 pages are pointed to the older pages on the website - 2010/11
Several of these (majority) are -
1) the external links that are embedded into the wordpress posts are resulting in a 404
the above link is generated from the page
2) Few pages on the website were published with special characters in the url ex-
google webmaster shows 404 on the following -
but the link is resolved into this by chrome and firefox -
I think something is resolving the url with special characters with a different code than it used to previously, which is why the older links result in a 404.
3) Google webmaster shows 404 on this -
it resolves into
...abc.../index.php/abc-exclusive-interview----carlton-chapman which return a 404
it should ideally return
The problem here is that if the url does not have special characters index.php is correctly replaced by year name, but if the url has special characters index.php does not resolve into year name.
Please help, I do not know how to fix this.