[Theme: Custom Community] white line under home page slide

i have 3 websites using this theme,

i know this white line can be took off but i cant seem to find were to do it,

http://www.duffydirect.co.uk

featured home page slide you will see a white 1px line under each image, its nothing to do with the image size if i remember it was something to do rectanglar or rounded but still cant find that option,

any help appreciated,

http://wordpress.org/extend/themes/custom-community/