Binary package hint: ubuntu-artwork
In Firefox (3.0.4) under Ubuntu 8.10 with the DarkRoom theme, radio buttons are ambiguous.
Unselected radio buttons have an orange highlight as if they are being hovered over (and don't have a 'bullet point' inside them). Selected radio buttons are completely black/brown as if they have been selected. See attached picture that illustrates the difference.
In the Human theme, selected radio buttons have an orange border with a bullet point inside them, while non-selected radio buttons are white. With the DarkRoom theme, it would be expected that selected radio buttons would have a bullet point inside them and be darker than unselected radio buttons.
This is with:
ubuntu-artwork:
Installed: 46.3
Candidate: 46.3
Version table:
*** 46.3 0
500 http://nz.archive.ubuntu.com intrepid/main Packages
100 /var/lib/dpkg/status
The simplest way that I've found to fix this is to navigate to:
/usr/share/
and replace your gtkrc file there with the one attached. I'd make a backup just in case something goes wrong, though.
The attached file merely changes the color of the bullet on the radio button (and checkmarks) from white to black, so that they are easier to see. Bear in mind, though, that when you hover over the radio button or the check mark with your mouse, it "glows" orange so that it partially obscures the black color of the radio bullet or check. However, moving the mouse out of the way makes it stop glowing.
Hope that helps!
Cheers!