Ban IP list not working

I get this error when I try to put more than one IP in the Ban Hosts box:

Warning: Wrong parameter count for array_unique() in /home/dreamwea/public_html/wp-content/plugins/better-wp-security/inc/admin/process.php on line 506

Warning: implode() [function.implode]: Invalid arguments passed in /home/dreamwea/public_html/wp-content/plugins/better-wp-security/inc/admin/process.php on line 509

What gives? I can put one IP in there and it’s fine (though it never saves anything to .htaccess if that’s what it’s supposed to do), but add another one, and I get the above errors, and the box is displayed empty with not even the first IP address in it.

https://www.ads-software.com/extend/plugins/better-wp-security/