Prestashop - some template fixes

Im busy with a prestashop website. I use for that a prestashop theme. Now there are some faults which are needed to fix as soon as possible. On the product list of my website, all texts are with a line in it (under-line) and I dont want that. When I do look at the code then I dont see that these texts must have a underline. I think my prestashop / or theme uses the user agen style sheet. I need to have that fixed , so that the product list looks good.