I’m having the same problem with my new theme, and it’s not just a matter of having commenters sign in. In the past, commenters have been able to comment on one post, and then their name and email address are pre-filled for any subsequent comments they make, all without being logged in. See the codex article on the WordPress cookie here.
I know it’s theme-specific, because it works fine with every other theme I switch to. I just can’t pin down what’s different about this theme.
Anyone have a resolution?
I had the same problem with my 1and1 hosted site. Solved it by adding the following line to the root .htaccess file:
AddType x-mapp-php5 .php
It enables php 5. See 1and1’s help article on this here.
