* SUMMARY Some IDL attributes appear on instances instead of on prototypes. 1. JSEvent properties on events ("clipboardData") => generated JSEvent::getOwnPropertySlot claims this is an instance's own property 2. HTMLDocument properties on document ("embeds", ...) => JSHTMLDocument::getOwnPropertySlot sets cacheable properties for JSHTMLDocument::info table entries 3. DOMWindow properties on window ("innerHeight", ...) => JSDOMWindow::getOwnPropertySlot sets cacheable properties for JSDOMWindow::info table entries A side-effect of this, is that these properties do not have expected property descriptors. (They should have appropriate getters/setters and do not).
I think Chris fixed the majority of these. I'm updating Web Inspector now to better handle the changes we've seen. Lets close this out.