I want my paragraph to be slightly further apart (not line-height, but between paragraphs) - e.g, an extra 3 or 4 points.

I've tried the CSS-inserts suggestion from a 2009 forum item, altering the margin-bottom value, but it didn't work:
.post p {
margin-top: 0 !important;
margin-bottom: 0 !important;
}

Any further suggestions? Thanks.

(Here's the site: http://lexician.com/lexblog/)

try it with 'div.post-bodycopy p'