MKV Header Compression Issues

I’m not sure how I feel about header optimization when it’s a breaking change.  Seems like the kind of thing that you don’t change the spec on mid stream, but maybe that’s just me. 


A few weeks ago I updated to the latest mkvtoolnix,
which I believe is currently at v4.2.0. I unfortunately noticed a bad
side effect of this, as mkvs created with the latest version were not
playing properly on some of my hardware. It turns out that starting with
v4.1.0 Mosu, the developer of mkvtoolnix, implemented “header
removal compression”.