So I managed to break the 'Custom HTML Page'.
Initially it wouldn't let me edit the text box's because the code I had saved had an error within it.
I then followed the link below that seemed to indicate it would reset the fields to the default values.
https://confluence.atlassian.com/display/CONFKB/Customized+HTML+Breaks+the+%27Edit+Custom+HTML%27+Page
However by doing so I got an error;
"Your request could not be processed because a required security token was not present in the request. You may need to re-submit the form or reload the page."
And now I'm left with some default text, and I am unable to edit the text box's still!
brokenhtmlpage.png
Any ideas?
Has anyone else experienced and got a fix?
Edit: It seemed to fix this issue it self, could have been a caching issue. Will leave open as I no doubt will face the same issue later on today...