I just installed a fresh copy of Movable Type Pro 4.21-en (for the indie power blogger). I have not yet added any plugins or new themes.

The installation appears to have gone smoothly. However, the site's appearance looks significantly different from the style's preview and major elements appear to be missing from the index page. The style I'm trying to use is Cityscape Portland.

The index page appears to be finding its stylesheet and images. Is this problem caused by a lack of content to fill in the missing blocks? Or is this caused by my using the wrong theme to present a Community Pack-using site?

You can see this site at: http://zarathud.org/
or a tiny screenshot of how it looks right now:
[img]http://zarathud.org/images/mt-looks-wrong-20080920.jpg[/img]

thanks for help and advice!

looking at styles.css you are missing a link to the global reset style sheet

try adding this to the top of your stylesheet and rebuild

OtherNiceMan, that worked well, fixing a lot of spacing issues.

Is this a bug that I should notify SixApart or the style's author about?

Also, just a note -- some expected parts of the page were still missing, and I finally realized the second problem: I was using a blog created as a "community forum". The style looks much better (and looks much more like the preview image) when used with a blog created as a "community blog". That may help someone else.

thanks for such a quick answer!

The blog.css is a global reset style to bring constancy across browsers. If set to community forum it should have used forum.css so best to raise it as a bug so that they can check.