There's a bug in drupal that causes comment links to go to the wrong node page on occasion. If you're not familiar with the issue, the discussion is at http://drupal.org/node/26966.
As of this writing, the bug has been pushed off to drupal 7. I needed something sooner, so I took one of the patches (http://drupal.org/node/26966#comment-335956) and made it into a module. I'll be very happy when I can deprecate this module b/c it'll mean the bug'll finally be fixed.
Thanks to sung-suh park for providing the patch I built on top of.
Note: If you want the views tweaks, this module requires at least version 1.6.