Make sure you've ran the "Find Updated Templates" via the ACP Templates area. You'll need to update headerinclude, index_boardstats and forumdisplay_threadlist with the changes made them in.
This is to prevent a CSRF vulnerability.
If you have "mark all forums read" links anywhere else, simply add the following:
This is to prevent a CSRF vulnerability.
If you have "mark all forums read" links anywhere else, simply add the following:
misc.php?action=markread&my_post_key={$mybb->post_code}