Theme Style and Options
Neutron is a clean, flexible theme that doesn't rely on heavy graphics to get the job done. You receive a good amount of theme variations, including: width of 600-1000px, logo placement, body text alignment, title alignment, fonts, font sizes, line height, sidebar placement, and color-picker support. I especially appreciate the range of width options, font sizes, line height and color-picker support. The font size options actually give you pixel measurements for the smaller sizes and EMs for the larger options -- so regardless of which "font-measurement camp" you are in, you should be satisfied. :) Color-picker support covers pretty much everything and there are 6 additional built-in styles to get you going.
Neutron has nice logo support through RapidWeaver's Site Setup panel. I added logos of several different sizes and shapes -- both square and rectangular, and they all appeared perfectly. The header itself is not one complete image, but a repeating horizontal image that boasts a nice vertical gradient, overlaying whatever header color you choose through the color-picker. This means you won't be adding full-size custom headers, but I bet you could pull something off using the RapidWeaver's logo feature.
There are 3 levels of navigation in Neutron. The primary navigation bar is located at the top of the layout just above the header, with the 2nd and 3rd nav levels appearing horizontally just below the header. As far as content is concerned, Neutron has styles for all 6 Headline tags and a nice script-like font styling for the blockquote. Of course you can do a lot of text customization using the available theme variations. The line-height option is a nice touch and I'd like to see that available in all themes.
Quirks
There's a small number of minor quirks I encountered while testing the theme. The theme's default styles gives you some text color issues, specifically in the nav bar where the inactive page link is a dark blue on black, and in the footer where the hyperlink color is white on white. Of course these can be quickly adjusted with the color-picker so it's very minor. Apart from that, you might see a few confusing results when using the color-picker. Adjusting the Title Text also adjusts the breadcrumb and footer hyperlinks with the same color, and Link affects the H1-H3 tags (not H4-H6) in addition to the links, even though I don't have the H-tags linked. You will also want to adjust the line-height variation for the blog page, otherwise the two lines of the blog title (title and date/category lines) run into each other -- more significantly in some browsers than in others. Speaking of browsers...
Browser Compatibility
I exported a sample Neutron site and viewed it in Safari 3, Firefox (Mac & PC) and IE6 & 7. Aside from a minor issue in IE6 everything looked great in all browsers. As I mentioned above you'll probably want to increase the line-height for the blog page, though. The IE6 issue is that the container extends out to the right an additional 5px or so, creating a thin, vertical line to the right of the header and all the way down the page. It blends with the content and footer areas since it is the same color, but it sticks-out on account of the header being different. There is a separate stylesheet for IE6, so it's likely a quick fix to eliminate this issue.
Conclusion
Neutron is a great, clean theme with a lot of flexibility and very little to be concerned about when it comes to bugs. I took a quick peek at the main styles.css document and it's very cleanly coded and CSSEdit-friendly for all you theme modification freaks... *points at self.* Thanks again to GWDI for the opportunity to review Neutron, and I definitely look forward to its future offerings.
