Odd Error in Slider

I'm getting this error: "Warning: A non-numeric value encountered in /home/sarahyoffe/test.shaolinseattle.com/wp-content/themes/fabulous-fluid-pro/inc/featured-slider.php on line 54" above the slider. It's a clean install from the zip file. I haven't done any hacking and I've deactivated the plugins but it didn't help. http://test.shaolinseattle.com/ Any ideas?