Which critical bug fixes are these? I've owned and used a WP7 since a few days after launch, all of the bugs are in the "annoyance" category, I don't know of any absolute show-stoppers.
Well I have to think that the SMS cache corruption bug mentioned in the article would be considered critical.
That's hardly a widely experienced problem. Google "windows phone 7 text messages corrupt"; first result is a MS answers submission by DanTup - the same guy who's blog is referenced in the HN post.