Jeez I don't know what is going on now...I can't even get the window to open to post comments. I get what you mean about comment and post pages being the same thing.
You can look at this link for an example: http://www.sixprizes.com/blog/2009/0...vals/#comments
I clicked to comment from the homepage and the full post shows up but the comment box doesn't open. There is also pagination below recent posts and I am also noticing that the tags are missing (I think that might be key).
I am in the process of deactivating plugins both nothing seems to be helping. I upgraded to WP 2.8.1 yesterday and am afraid that might have affected something.
Also, I tried switching themes and the problem is still there, no comments or comment box and tags missing on single post pages.
EDIT: FOUND THE CULPRIT! YARPP (Yet another related posts plugin) was messing something up. I deactivated it and everything was cool. I really liked that plugin too.
However, it still shows only the excerpt directly after I posted a comment. It loads a page like this:
I guess I'll try deactivating more plugins and see if I can solve this.
EDIT AGAIN: "SEO for paged comments" was the problem. Full post now loads.