custom user block to work on archive pages

I have a custom block, based off this code http://drupal.org/node/213855 that works great.

Can anyone help me get this block to also work on the archive pages (from the links from Advanced Blog navigation block), which are not user authored pages, which I assume the block is targeting (block is present but not rendering it's content)?

Alternatively, can I identify these archive pages to my block, so I can not show it for the archive pages? These archive pages have no unique body classes or path, that I can otherwise control by css or block visibility (although they capitalize the user name in the path).