I just download v2.0.4 and the photo gallery works great.
I use the single thumbnail mode. I change the width and height for Thumbnails to w=210 and h=168. The Thumbnails works except the Title bar is longer than the thumbnails.

How can shorten the Title bar width fix this?

Problem solved. How can I get rid of a little black circle next to the thumbnail?

You have conflict with your css. The gallery inherites the styling fromat line 224 of template_css.css folder. If you remove this or change it to #content ul li {
list-style-type:none;}you will solve your issue but you probably remove bullets from other lists in your content too.

Thank you for the quick response! I use a more specific class to get rid of the black circle. Problem solved :D
#content ul.sig-container-single li {
list-style-type:none;
}