Captioned Image not aligning center

[AliKK]

Hello all. I'm experiencing the problem in IE on a PC and on firefox on a Mac.

http://www.rstuartandco.com/2010/01/...ch-at-thistle/

You'll see that these are captioned pictures. In the visual editor for the post I have it checked to align center. However, they're aligning left.

Knowing that, look at this:
http://www.rstuartandco.com/blog/from-the-road/

You'll see on this post that the images are aligned center. However, these are just images, not captioned. If I caption them, they move over to the left.

That leads me to assume there is something up with the CSS for the captioned images:

.wp-caption {
    border: 1px solid #DDDDDD;
    text-align: center;
    background-color: #EEEEEE;
        margin: 0px 10px 5px 0px;
    padding: 4px 0px 5px 0px;
    -moz-border-radius: 3px;
    -khtml-border-radius: 3px;
    -webkit-border-radius: 3px;
    border-radius: 3px;
    }

.wp-caption img {
    margin: 0px 0px 5px 0px;
    padding: 0px;
    border: 0px;
    }

.wp-caption p.wp-caption-text {
    margin: 0px;
    padding: 0px 0px 0px 0px;
    font-size: 11px;
    font-weight: normal;
    line-height: 12px;
    }

Is there anything there that seems funky or off? Thanks!!!