Ever have this problem when upgrading WordPress…
A recently upgraded WP blog looked great, seemed to be working great, until we noticed it wasn’t counting comments. It listed all posts as having 0 comments, even if they had one, or several.
I’d never had the problem before, but since a Google search produced lots and lots of other people having the same problem… going as far back as WP 2.5 … I thought I better not lose this link to a bit of php code which solved the problem handily.

I’m having this same problem right now. It still shows 0 comments even after I refresh the page several times.
With any luck, the code at the link provided should work for you. Keep it handy, though, because I had to re-run the script again a few weeks later to let the count catch up with the comments.
Hello!
Very Interesting post! Thank you for such interesting resource!
PS: Sorry for my bad english, I’v just started to learn this language
See you!
Your, Raiul Baztepo