When I enter my website http://domain.com it redirects to http://www.domain.com// (double slash in the end).
What is strange, I haven't set any redirects in .htaccess file. Actually that file is empty. I've tried to add some rewrite rules there, but the same problem appeared again.
I can't understand where have been set that non-www to www redirect? Do you have any ideas.
Thanks.
Try using this code to remove double slashes from the urls.
Change the 302 to 301 once you get it working.