Made a bad Update to my app what is your experience?

Guys I recently had a very very bad update with a bug in it. It slipped through QA, now I got my first bad review and the last few days ever since the downloads dropped to 0. I already uploaded a bugfix but since it is within the "holiday" times it seems apple takes longer than expected to let the update go through. I even got already 9 crashes. I used to have 0. So the update has a really major bug. What is your experience with it? does it kill your app?