Same here. I have several accounts I used for communities, and they were all "" which I was able to change ALL the keys, password and recovery account.
BUT: The two original accounts I used on steem, have recovery accounts of "" and my Owner Keys do not work for them on peakd.com, as user above NOTES!
Active key works, Posting key works, Owner key does not work. I believe I created these accounts before I knew what a Master Key was, or before that even existed, not sure. Assumed I was fine if I had my Owner key, now they don't seem to work on Hive?
RE: Review your recovery account, if you don't want to lose your assets!