A bug in Blacklist version 1.7 Rev A (released ~45 minutes ago) rendered Blacklist useless if you had (and since it’s enabled by default, there is a high chance that you have it) “Don’t block my own posts” on.

It’s been fixed in version 1.7 Rev B, so if you are on 1.7 Rev A, please update it manually from the control panel. I’m so sorry about this.