Table Corners

Hello,

I am trying to make my own tables with rounded borders on my website using border-radius CSS, but whenever I do, I get the rounded corners with square corners around the outside (see screenshot). I’ve used this same code on my other website that uses a different theme and it works fine, leading me to believe that the Highend Theme is doing this. I would use the teaserbox elements, but I need them to be inside of a text block and that doesn’t seem to work when I tried it. Please let me know if there is any solution to this. Thanks.