It is indeed mysterious. One other annoyance that is definitely in Google Chrome, if you post to the Comm Center, and your post contains a link to another post in the Comm Center, you get a cross-site scripting error and it won't take you back to your post. You have to go to the home page then navigate back. Irritating. There is a way to turn it off in Chrome, but I like the extra security elsewhere so I just live with it.