It's a quick fix, just change the colours to match your own member page.
/*************
* Comments *
*************/
#subscribe_button {
text-align: center;
margin: 5px;
}
#add_comment_box {
width: 100%;
position: relative;
}
.comments {
position: absolute;
left: 0px;
margin: 8px;
width: 50%;
}
.comment_editor {
padding: 4px;
}