Known Issue: no known issues documentation.
Also, the Known Issues page bears the mantra "never abbreviate beta/beta". Wise words.

I know it's the title of the bug (after looking at it), but one thing about the What's New section of the readme bothers me:

"Undetected document.all support has been added to Mozilla."

Shouldn't "undetected" be "undetectable" or something? It might help clarify what this addition is. Unless I'm just going crazy and you think this is a bad idea, would you be the one who could make this change? :-)

Could you make the rough changelog use a table like in the previous release notes? It helps sorting the bugs by ID using <plug>a bookmarklet to numerically sort tables</plug>... :-)

Not to be picky, but another thing about the release notes: I'd suggest changing the titles for "Browser", "Mail", etc. under "What's New" to H3's instead of plain text inside a SPAN. It's more semantically appropriate. :-)