Twice now while attempting to reply to a post, I was re-directed to a Captcha page (I verified that I am logged in and have so many posts that I should never be encountering these). Even when I clicked to confirm, the reply was ignored.
I am more than halfway expecting this posting to fail, too, but it passes Preview (which also sent me to a Captcha page when trying to reply).
TC Pro Platinum 2018, 2017, 2016 & 2015 (all with LightWorks & RedSDK) & V21
System: i7-5820K @ 3.30GHz, ASRock X99 Extreme4, 16GB DDR4-2133 RAM, Gigabyte GTX 970, Samsung NVMe SSD 950 (256GB), Windows 7 Pro (64-bit) SP1