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100% sure, I use my keys correctly all the time. It only works with master as far as I can tell.

In fact I just logged out and logged back in with the posting key I was using just to make sure.

Probably a bug then. Steem api works with posting key.

apparently I have to use .fromString():

var key = dsteem.PrivateKey.fromString('posting-key-goes-here')

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