I knowwww! It's Readability's fault. I've opened a ticket and they've actually been very responsive about fixing it. Something to do with SSL.
For now, you can just select the text you want to Spritz.
Looks like you've actually now surpassed your Readability API limit... oops! Great bookmarklet, by the way
Rich, if you'd like help with clean text extraction, ping me at john at diffbot.com. I like the Spritz concept and we'd be happy to support your bookmarklet through free API calls.