Quote Originally Posted by grafrich View Post
So would 'об этом я не хочу снова услышать завтра!' be correct?
Both variants are correct.
There is a slight difference, as was said. Once vs anymore. But these meanings are very close in this case, because, if you do not want it even once, it automatically implies that you do not want it twice, because "twice" implies first occurence of "once". And so on. So, there is very thin difference in usage.