ndrwld

I’ve found the solution, to not hardcode pagination base. Place this code into your theme functions.php or ../wp-content/mu-plugins.
Just add priority number to the function:

function custom_pagination_base() {
	global $wp_rewrite;

  // Change the value of the author permalink base to whatever you want here
	  $wp_rewrite->pagination_base = 'new-pagination-base';

	  $wp_rewrite->flush_rules();
}
add_action( 'init', 'custom_pagination_base', 1 );

I’ve found the problem. It was in custom_pagination_base function. The new one is:

function custom_pagination_base() {
	global $wp_rewrite;

  // Change the value of the author permalink base to whatever you want here
	  $wp_rewrite->pagination_base = 'pages';

	  $wp_rewrite->flush_rules();
}
add_action( 'init', 'custom_pagination_base' );

However this works only for default post types (I didn’t tried it with pages).
Unfortunately it doesn’t work with custom post types. And I don’t know why.

If pagination base is hardcoded in wp-includes/rewrite.php – everything works fine.

Thanks scribu for your response.
Yes I did flush rewrite rules. I also tried on my other wordpress installation with all plugins disabled.

Is it possible that the problem in posts loop? I’m calling posts through WP_Query class.

$loop = new WP_Query( array( 'post_type' => 'post', 'ignore_sticky_posts' => 0, 'posts_per_page' => '5', 'paged' => get_query_var( 'paged' ) ) );
	while ( $loop->have_posts() ) : $loop->the_post();
        ......
	endwhile; // End the loop.

and then calling wp_pagenavi with:

if ( function_exists('wp_pagenavi') )
    wp_pagenavi( array( 'query' => $loop ) );

Big thanks for changes and link. Link to BP members page works perfect.
Right now for my purposes, there are pretty enough options. It can be also used by other users to display users of their blog.
I really like it!
Thanks once more.