Firefox’s auto-update took me from 220.127.116.11 to 18.104.22.168, and in the process introduced a regression (hitting one of my credit card web sites now crashes the browser reproducibly). I sent in the reports (both through Vista and the talkback agent), and got a notification of an update that’s available.
The link (hovered over to make it clear) is just the generic firefox page, but it in turn mentions 22.214.171.124
I’m very happy to see that as an end-user experience. Application crashed (non-Microsoft one in this case, but it shouldn’t matter since the Watson/reporting interface is open to anyone) and I got some feedback (none about this particular bug being fixed, but that’s fine) that let me know about a version that may help me out. Very cool.