Quoting hamwise, reply 102
This is more like your boss calling you in on your day off because [something unexpected happened.] He asks you to fix it and you give a quick estimate which ends up being wrong. As with any impromptu response to an unexpected event, things are already not going according to plan, so estimates are frequently going to be wrong. *shrug*
Doesn't that still tend to tick off bosses because "you should have given a better estimate" or "why couldn't you do it when you said you'd be able to"?
End of VR_IronMana's quote
Depends on your boss. My boss is pretty good about realizing that while we gave our best estimate, "stuff happens". Especially when people get called in on an off day unexpectedly.
IMO the estimate was a good faith one and simply didn't work out because something went wrong. That happens frequently when plans change on the fly like they did today. In this case, people should just accept it.
Otherwise, we'll wind up with Blizzard style responses where they refuse to give time frames or indications about what is going on except in the most trivial cases.