I'd also like to suggest a work-around for those out there (which in itself could also be classified as a related bug). If you allow the page to display, and you'd like to see the source, simply "select all" and then "view selection source". Tada! No impassable "nag screen", yet arguably also not working by design, seeings as you're still "vulnerable" to whatever the DOM insepector is reading (which is effectively everything, including what's in <head />), you're just not warned about it.
I'd also like to suggest a work-around for those out there (which in itself could also be classified as a related bug). If you allow the page to display, and you'd like to see the source, simply "select all" and then "view selection source". Tada! No impassable "nag screen", yet arguably also not working by design, seeings as you're still "vulnerable" to whatever the DOM insepector is reading (which is effectively everything, including what's in <head />), you're just not warned about it.