I'm having the same issue as another user on this forum had back in October relating to 3tb drives and incorrect paramater. Although my burns seem to be okay, I always get that error at 99%. I tried to reply to the topic but it wouldn't let me so I will reference it here with a link.
http://forum.imgburn.com/index.php?showtopic=18956
I was hoping Lightning UK! could send me the beta he was working on like he did matt6950, which presumably fixed the issue.
Again, I apologize for having to create a new topic.
Thanks.