When I read the release notes I don't understand what the social links is about and where I can find this:
Social Links: this module is a canonical source, based on Publicize, that themes can use to let users specify where social icons should link to
Also can you point me in the right direction what I can do with 'filters' (is this being edited by functions.php). You mention:
You can now customize the captions, thanks to the jetpack_slideshow_slide_caption filter
But for what reason you added a filter and what can I do with it?