Hey guys, good news. Just spoke with JustHost! Here is the convo:
Ana: Welcome to Live Chat support, how may I help you?
Me: Hi there, I’m having a problem with my WordPress installation. It seems to be limited to JustHost
Me: I keep getting 406 errors when updating posts/pages that contain images
Me: I know you guys aren’t the ones who support WordPress, but in discussion with other people, it seems that JustHost is the common denominator
Ana: Please allow me some time to check
Me: ok, thank you
Ana: We are aware of the issue, there is some problem with the mod_security function.
Ana: Our admins are working on the issue, it will be resolved as soon as possible.
Me: great! thank you very much!
Ana: You are welcome!!