Only block issues out of my direct control I've seen are the "10pm eastern lag of doom" and my RMB literally glitching (have to hold the mouse button a little tighter).
I'm trying to see if there's a simple way to measure in-game latency to the TERA servers to see if disabling nagling will affect the lag at all.
I'm frustrated cause I was very comfortable with blocking and almost never took damage in any instance or pvp, but now I can't help but get hurt and knocked down constantly because of this bug. It has to be a bug. I home a dev makes an official statement about this because a majority of players are quite frustrated with this!
I wonder if there was a change to the network side that made holding block more sensitive to packet loss. Shrug~ speculation.