We have a long conversation going on with 10+ participants in our forum. After conversation reached 20+ pages, we observed an odd behavior. When there is just one post on last page, it show up in the inbox alert but clicking on that brings us to one but last page of the conversation. And there is no way to read that message unless page number in the URL is manually incremented or another post is made to make more than one posts on the last page. I have a doubt that some one has deleted one message from the ongoing conversation that is causing this wrong pagination calculation.
Thanks for pointing me to the previous bug report. Since, we have latest version installed on our forum, and I can say, in one of our conversations, we see it on ever new page. Hence, it is not a random issue.