If your client is being very picky about the titles of certain pages, especially views, you may find yourself needing to write some code to set the title at the theme level. This is normally fine, since Drupal 6 has some great hooks, like hook_preprocess_page() and its cousins for blocks, nodes, and user profiles.

One of the most frustrating things about Drupal's current architecture is that comments, and the form to post them, are attached to nodes and don't easily allow you to move them around in your TPL files. There really should be an easier way to just place them anywhere you'd like. Most times this doesn't get in your way, until you want to do some fancy layouts where your content is split into multiple columns on the page.