No Category Base

Has anyone ever tried WP No Category Base (

I have used it successfully on a few sites and installed it on the update to one of my sites but have now run into problems.

It removes the "category" prefix from posts, so instead of "" you would have "" (assuming a pretty permalink of /%category%/%postname%/.

I enabled it on and now the /%category%/%postname%/ permalink no longer works (I know WP does not recommend this format). Even with the plug-in removed, it seems that WP tries to deliver the post without the category part.

To see the problem, you will have to visit something like because the index file still pulls up the old site. Then click on a category.

Does anyone know how to fix this so that wordpress starts to look for the category again?