@john: I'm not sure where the difference lies between your device and mine.. but I've tried your use case and I could click 'keep unread' checkbox 10 out of 10 tries without any problem at all. Though I do think the navigation and ui of android's browser is a few steps behind iphone's as there's a weird (unintended?) cursor repositioning\screen jump after every checkbox click.

Yes, stylus can be useful. But I'm not sure about fat styli over capacitive screens.

@tso: yes, you're right.