Can you send me a copy of the helper groups rules php file you are using? I'll add it to my test site and add an html editor and see if I can reproduce the problem. I'll have to reproduce it to fix it, so any information you can give me about the exact steps would help. It wouldn't be happening with any change to the page, but possibly a specific change like adding an html editor with file management... what pages do you go to and settings do you use in the html editor? If I can reproduce an issue then I can fix it. The hard part is usually setting up the environment and following the right steps so I can see it.