@abegreen:
The commas between tags are default-generated text nodes (i.e., not HTML elements), which cannot be directly targeted or styled using CSS.
However, you can use the CSS below in the Additional CSS section to visually hide them on the post listing pages.
.cat-links,.tag-links {
font-size: 0;
}
.cat-links span,
.cat-links a,
.tag-links span,
.tag-links a {
display: inline-block;
font-size: 12px;
margin-right: 5px;
}
Note: These commas may still appear on single post/detail pages, as the tag structure is handled differently there.
Regards,
Sujapati