Yep - this is an area I know a lot about.  3 different browsers.  All memory reset.  2 computers.  It took me an hour to make that post today, and they clearly are messing with me.  3 different admin emails.  Nothing.  I can not post.  Interesting.  I can see what's happening in my address bar, they redirect me to logout anytime I hit post.  They have hotlinked my post key to logout.