Plugin error after last Update

Im using your plugin both in sidebar and after post in http://sport-gadgets.net and I dont know what has happened since the last update:

Warning: in_array() [function.in-array]: Wrong datatype for second argument in /home3/vatzeni/public_html/sport-gadgets.net/wp-content/plugins/easy-related-posts/erp_display.php on line 60

now the plugin is deactivated, but you can see the same issue here:

http://smtv.senshimedia.com/s1-english/shutter-bugged.html

know how it can be solved?

http://wordpress.org/plugins/easy-related-posts/