Well, Joomla itself is on 1.5.18 at the moment, you are still on 1.5.12
JoomlaComment is now on CompojoomComment 4.1.2 stable.
However, I tried to find trouble posts in the pagination area, and Joomla has some posts from 2008... sort of 2 years back.
I can't find any posts in the JoomlaComment system that is of a similar character though.
So my advice would be to update the Joomla first.
Then make a backup of your comments database, and install the JoomlaComments, as latest version as you can.
As far as I can see (as you read), the issue you are talking about is not something that others have seen (at least I couldn't find one), and hence has not been targeted as a bug to be fixed.
However, after trying to find something related to your problem, I do not think these steps will have any direct effect for you. Then again, I am thinking that perhaps what you are seeing may be the result of some other process working that is now fixed. So it may fix the problem, even though it is not a directed issue.
Do you have a link so I can see the issue?