I have updated to the latest release of Steem v0.19.3, released while I was on vacation. This release isn't a hardfork, but addresses some security issues from spam attacks:
Previously fixed, but not contained in a tagged release, is a fix for an I/O vulnerability that could lead to a denial of service attack on nodes.
Added mitigations regarding bandwidth for custom operations, exploitation of which could lead to minor network instability, resulting in high block latency and the missing of blocks by witnesses.
Witness Node Config:
Feed: 3.135 (updated every 15 minutes)
APR: 0.0%
Registration: 0.1
Block Size: 65,536
Missed blocks: 137
Thank you for your support. Peace.
My goal is to share knowledge, truth and moral understanding in order to help change the world for the better. If you appreciate and value what I do, please consider supporting me as a Steem Witness by voting for me at the bottom of the Witness page.