'Polylang_Admin_Filters::flush_rewrite_rules' was given in

Hi, I am developing a new site, and when i try to set the home page to a static page i am receiving the following error:

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Polylang_Admin_Filters::flush_rewrite_rules’ was given in /home/kompbg/public_html/domain.com/wp-includes/plugin.php on line 405

When i reload the options page it shows the correct static page, so i guess it’s working, but still it’s a little disturbing. If i change the page with PolyLang deactivated it works without any problem.

http://wordpress.org/extend/plugins/polylang/