Kempelton 3.2 11
The new Kempelton version has an updated back and forward button style just like Qute 4.1, as well as a few more improvements. Each of the default set of toolbar icons has been carefully tweaked in color and shape. The back and forward buttons are slightly lighter and the stop icon is more subdued and shaded more consistent with the other icons.
With such a simple design as that of the Kempelton reload icon, you might think it would be easy to find the right shape, but I have kept finding the need to refine it in pretty much every version.
Together, I think, the impression is lighter and more balanced and harmonic.
Kempelton Large is also updated.
Icon set additions
The SVG set is updated as well and has a few additions not in the Firefox theme, seen here. They were for an updated Thunderbird theme, but then I lost interest and got less time.

Kempelton 3.1 is released. It is updated for, and requires, Firefox 3.5 (beta). (If you don’t want to run a pre-release, you shouldn’t have to wait much longer until it’s final.)
The oldest Firefox theme available has returned in a completely new version. I’m proud to announce Qute 4, available for Firefox 3.5.

I’ll introduce some of the changes. Obviously, the unified back and forward buttons have been adapted from the default theme, something that took a lot of effort to do well. The border radius, arrow shapes and obviously, color and gradients are some of the aspects that have been through countless iterations to find the right appearance. There are also hand-tuned active and disabled state images and, a notable usability advantage over the default, a subtle drop-down hover indication.