Pagination problem

In my website comments get paginated after more than 90 comments are posted. If the user try to go to the second comments page the page loads but there is no comments. If the user tries to go back using 'previous' link he gets the list of emails for the new comments (security hole).

To reproduce:

1. This a website with Indic characters. Don't panic. You just need to click the pagination pages.

2. Go to this page: http://www.sachalayatan.com/sondesh/37081. At the time of this writing there were 94 comments. So the second page should have four comments.

3. Scroll down. At the bottom of the page, you will see ১ for page 1, ২ for page 2 and 'পরবর্তী ›' for 'Next >' and 'সর্বশেষ »' for 'Last »'. Click the link for next or 2. The link is 'http://www.sachalayatan.com/sondesh/37081?page=1'

4. The node reloads but there is no comment. (BUG 1)

5. Now scroll down. You will see '« সর্বপ্রথম' is for '« First', '‹ পূর্ববর্তী' is for '< Previous' and ১ for page 1, ২ for page 2. Click 1 or the previous link. It points to http://www.sachalayatan.com/ajax_comments/js_load_thread/37081.

6. The page now shows the email addresses of remaining four comments. (BUG 2). This is a serious problem considering the fact that the email addresses are actually hidden from the guest users.