RC12 is the same as RC11 with the sole exception of
+ a patch that improves page break detection on dialogue.
See, normally, a page is broken along long dialogue blocks at the end of a sentence, but the paginator was being thrown on words like "Mr." and "Ms." and "Dr." which look grammatically like they may be end of sentences, but are actually abbreviations. So hopefully for most cases, the page won't break.
Please report any bugs to the forum!!