If you are using the Firefox web browser on a Mac, and running liveSite v7.1.1, sometimes the Rich-Text Editor doesn't let you edit anything in the content area, but when you close and reopen it, you can.
It only occurs in Firefox on the Mac. It can be annoying, but i is non-destructive. You can sometimes click on the HTML view or any other menu item in the Rich-text Editor that opens up a pop up window, close it, and that usually shakes it loose and you can edit your content.
You can also use Safari browser and avoid the issue entirely.
We are not sure if this is a bug in liveSite or in the latest version of Firefox at the point but we will fix it if we can.