Display User Picture on some pages according to content type

Altering the node.tpl file can be used to control where user pictures appear (provided that you have turned them on in User Settings and Theme of course).

For example I had a site which comprised formal pages where avatars were NOT wanted, and a Forum where they were.

In English this means "if the user has a Picture AND the page content TYPE is a FORUM POST - print the picture" (and if it's any other part of the site, then don't print the picture...).