I was having this problem in the featured products listing, specials listing and new product listing because I had custom pages, so I thought I'd post what worked for me. Hopefully it will help someone else.
Originally Posted by vidmalis
replace all instances of:
zen_image($template->get_template_dir('details.gif', DIR_WS_TEMPLATE, $current_page_base,'images').'/details.gif')
zen_image_button(BUTTON_IMAGE_GOTO_PROD_DETAILS , BUTTON_GOTO_PROD_DETAILS_ALT)