I was looking for the way to get the "underline on hover" feature back, if desired, and have found that you need to add a section with ":hover" *after* the main section that sets the underline to off.
And while writing this post, I discovered that the "small" repeats of recent posts (that appears underneath the reply when typing) no longer have a class of "post", but have a class of "list_posts". Links weren't being underlined there, but this change turns those on as well.
I've also combined sections, so it doesn't look too repetitive.
/* Underline post, list_posts and personal message links */
.post a, .list_posts a, .personalmessage a {
text-decoration: underline;
}
/* Remove underline from quotes in posts, but put it back when hovering */
.quoteheader a, .codeheader a {
text-decoration: none;
}
.quoteheader a:hover, .codeheader a:hover {
text-decoration: underline;
}
That's the how. Whether or not you want to change it is up to you...