[Plugin: Sociable for WordPress 3.0] Wrong datatype error

I get the following error when I activate the plugin. I thought you’d like to know

Warning: in_array() [function.in-array]: Wrong datatype for second argument in /…/wp-content/plugins/sociable-30/sociable3.php on line 61

http://ww.wp.xz.cn/extend/plugins/sociable-30/