In functions-controller.php function zp_handle_comment(), it checks for:

[isset($_POST['name']) && isset($_POST['email']) && isset($_POST['comment']))

However, right after that, it checks if these exists again, and if not, assigns "". What is the reasoning behind this? This means that even if I don't require e-mail, I can't remove it from the theme.

Should be safe to remove the first check altogether, no?

The checks seem out of place. You should be able to remove them. The required fields tests should be enough.

Great, thanks. Will you get this into trunk as well? I'm sure I will forget why comments aren't working for 1.3 otherwise

Done