Pasting a character sheet into API Script Editor and saving breaks the API Script Editor

Being temporarily confused about what was in my clipboard, I pasted character sheet HTML into a new API script and hit save. This caused character sheet HTML to become part of the API Script Editor page, and rendered my Save, Delete, and Disable buttons, as well as the New Script tab, inoperable. I had to clone my campaign and delete the original to rid myself of the "script" I'd created. For reference, the character sheet I pasted in was the V20 sheet found here . The editor page remained broken in both Firefox 37.0.2, and Chrome 43.0.2357.73 beta-m, on both Windows 7 and 8.1. Seems like some sort of input sanitization/escaping issue to me.

Part of allowing the API to have the control it does makes it vulnerable to borking the interface if you put the wrong things in it. It's why there are so many warnings at the top of that page.