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Looks like now Mbin, at least on mobile, mixes threads and microblog posts
(media.thebrainbin.org)
Must've been a recent change because somewhat frequently I'm using it on the go and just now it started appearing for me.
Also banners appear on the top of communities now too. =D
But then you don't see other content like photos and videos.
No this "threads" is just referring to everything that is not a microblog.
Photos appear fine though? And I rarely see threads with videos attached so don't think those would appear on a quick check anyways.