A new version of Steemd was released 3 days ago, which addresses some important vulnerabilities.
This release fixes a vulnerability in how the pending transaction queue is treated during block application. In the worst case, the previous behavior could result in block propagation delays and general instability/denial of service of the Steem network.
If you recall a few weeks ago, steemit.com was suffering from some DDoS attacks, and it appears to be related to this issue. All witnesses should update to this new version. Thanks 
My server is currently replaying the Steem blockchain and should be functional again in a few hours.
My witness is deactivated until then, and will be reactivated when I wake up.
Thank you for your time and attention. Peace.
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Posted from KURE