I was checking out my local ISP page (http://www.scc.net/index....rvices:dsl), and used Page X-Ray "Show Comments", which exposed a comment. Then I clicked the button again (to hide the comments), and it gave an error message.
I tried "Expand All", which did change the screen, and a second click of that reverted the screen.

I assumed that a second click would reverse the action. Is this correct? (If so, it would help if the button text showed that it was already active somehow).

Thanks for the note, the hiding the comments is a little tricky but we should make it work too. I'll add it to the list. By the way you can always hit the browser refresh button to restore the page.

Yeah, I found that out. Sorry I didn't mention it.