Rog,
Sorry you keep getting hit with issues with the comments, and thanks for the admin credentials so that we could debug it.
We just implemented a fix, and you should be good. The issue wasn't related to the above, it was with how we were detecting the version of Mootools installed to switch how we do the Ajax request. This helps for compatibility between Joomla 1.5 'normal', Joomla 1.5 with the Mootools upgrade, and Joomla 1.6, in case you're curious.
Anyways, I deleted my test comments and set your email back up to receive new comment/like notifications. As always, please test and remove my admin account.
Thanks,
Alex