odd messages in some posts (win.postmessage)
 

A number of posts seem to have odd messages at the end of the style

window.post_1489234923892_2 = function(win,msg){
win.postMessage(msg,"*");
}window.post_1489234926360_10 = function(win,msg){
win.postMessage(msg,"*");
}

I have seen this from more than one user and would suggest a browser or site issue to me

Admin has previously been notified of this issue; thank you for posting your observation.