When I have comments for a post and they are displayed, the phrase "X Comments to Post Title" shows up at the top of the comments (for example see http://frugalfunottawa.ca/frugalfish/?p=312). I have changed my center background color so that it is dark, and now this phrase is almost hidden. The font size of this phrase is also huge, I'd like to make it smaller. Can anyone tell me what code I need to insert in the css to accomplish this? Thanks.

I don't recall if there are theme settings to do this but you could use the following in ATO>Add HTML/CSS Inserts>CSS Inserts and tweak the color and sizes as desired.

#comments {
    color: #fff;
    font-size: 12px;
}

Ok, that worked! Thanks. I'd also like to change the color of the words "Older /Newer Comments". The color didn't change, it's the default body/text link color. I can change the newer/older post indicators through the theme options but I can't change the older/newer comments indicators the same way.

Thanks.

1) go to a post with more than one pages of comments
2) go to one of the comment pages where it shows both the older and newer text.
3) view the source of the page
4) do a search for 'older comments'
5) look at the HTML that has been generated for that code
6) using the HTML elements and ID/CLASSes that are used create a CSS selector and rule
7) put the CSS into the CSS Inserts option
8) test it

You can also use firebug in firefox to look at the element and see what CSS you need to override. Playing with the CSS and experimenting is the best way to learn this stuff when you want to go beyond the theme options

I looked through the "view source" but I'm getting a bit lost - the div id seemed to be very long

<div class="clearfix navigation-comments-below"><a class='prev page-numbers' href='/frugalfish/?p=78&cpage=1#comments'>&laquo; Older Comments</a>
<a class='page-numbers' href='/frugalfish/?p=78&cpage=1#comments'>1</a>
<span class='page-numbers current'>2</span></div>

When I used .clearfix navigation-comments-below to try and style it, it didn't work. I think I'm on the wrong track Also, I made a $20 donation when I first signed up but am not listed as a gold member. I'd like to remove the "Powered by Atahualpa" from the footer and have read that I need to be a gold member (which I believe I am with my donation) to get instructions for that. Is this something you can look at? Thanks.

In your situation I used Firebug and saw the classes for the older and newer links was .older and .newer but they are links so the selectors become .older a and .newer a so the CSS to change the color of the older and newer links, to red for exampe, is as follows.

.older a, .newer a {
    color: red !important;
}

I had to add the !important to override CSS that is in place. This is sometimes necessary.