I was using the following permalink structure on my wordpress blog previously
http://domain.com/some-text-missing.html
Now I have changed the permalink to
http://domain.com/archives/2010/09/some-text-missing/
The tag structure is
http://domain.com/archives/tag/sometag/
I am using the wordpress redirection plugin and I am stuck with the regular expressions.
I don’t know about the plugin you are using, but if there are not to many sites, i would do the redirects directly in .htaccess like this:
you can’t use here a regex because the new url structure has a new variable: the year/month. so regex wont know where to redirect your users. I don’t know about your plugin, but i would write it myself, I would read the file name “some-text-missing” then search for it in the database and if found redirect to the new url.