Various iterations of the favicon design are presented here. The version in use on this site is ico5 although ico2 also works well.
Ico5 was chosen as ico2 has some issues at 16px size with the lower edge of the L blending with the lower edge of the circle.
This iteration of the logo features an enlarged stripe circle with a lighter tone of grey. Depending on version the size of the L, border weight and L border weight are different.
Click to download 32 x 32px .ico file