This seems to be a problem only for me, and only on one of the sites I'm working on, but the active class doesn't get applied to the link of archive page that I'm currently viewing. I've used an archive block on two almost-identical sites, and active gets applied properly on one site, and doesn't ever show up on the other.

As I'm relatively new to Drupal, my ability to troubleshoot is rather limited, but I did try recreating the view myself, instead of using the default template, and tried using the custom views that were used before Archive was included as a standard view in Drupal releases, but no dice.

I'm not using any fancy URL aliases, and the paths of the pages perfectly matches the paths of the respective links. Active gets applied perfectly everywhere else on the site, just not on the Archive block. Any ideas why this might not be happening?