Comments On (Static) Home Page leads to 404/Other random pages

Hi
I have a rather interesting issue.

I have added comments to static pages using this snippet of code:

<?php comments_template(); ?>

Now it works perfectly on EVERY other page except the home page. I have pretty perma-links enabled (only post name) and it leads to a 404 when a user presses submit. However if u reload the previous page the comment is there.

If i change the perma-links to default it gets even more strange, upon pressing submit it redirects to the blog page.

I have made sure there are closing tags on the comment form.
It is a modified Kubrick theme but I haven’t touched the comments page(s)’ code.

I have browsed heaps of posts but none seem to dfeine an answer.

Thanks for any help

(I am good at CSS, HTML and editing PHP)