I heard about it from HanDuet.
I just stumbled across some new checksums in HanDuet’s supplementary guide, which relate to the aforementioned v2.5.1.
The supplementary guide can be found by following the link in section 6 (file verification) of the ultimate introductory guide. There is a readme file included with the release according to this, and I would be interested to see what it says without having to download the entire MKV too.
Bluto