I use wp-Page-Navi plugin for page navigation and Seo-Without-Category, for the link translation: http_://super.com/category/mycategory/ to http_://super.com/mycategory/, i.e. to remove /category/ from URL. Recently I faced the following problem. If one of the categories contains more than 10 news, page navigation occurs, i.e. 1,2,3 etc. pages in the category. So, Seo-Without-Category makes 2d and 3d pages from any category have URL: http_://super.com/mycategory/page/2/ http_://super.com/mycategory/page/3/ it leads to 404 error, and if I open it manually: http_://super.com/category/mycategory/page/2/ http_://super.com/category/mycategory/page/3/ i.e. adding /category/ into URL - it works. Could you please tell me how to correct .htaccess (or smth else, maybe wp-pagenavi.php) to make URLs look correspondingly http_://super.com/mycategory/page/2/ and to make pages open without troubles?
Remove the plugins. I know that WP-PageNavi has not been updated for almost two years and reportedly does not work in versions above 3.0. The other plugin I know nothing about, but check the main page at WordPress Extensions to see its development status and forum posts. If there is a problem with it, you will quickly find out. As a word of caution, always check the WordPress.com Plugin page for how a plugin is functioning before you install it.