I'm a little reluctant on using the new MetaX because of this one question.
Does editing chapter titles in MetaX result in the timing of chapter start/end points being off, or does it simply just rename the chapter marker, without changing the start/end time of the chapter.
For some reason, I was under the impression that using MetaX could result in your chapter markers ending/starting a couple of seconds too early/late.
I don't know about chapters starting or ending too early/late but I haven't seen any problems with it. The new Handbrake is much faster and much more reliable. It's a great update! If you're using Handbrake, update (but it's just my initial impression with about 7 movies run through it)