Posted 04 December 2007 - 04:38 PM
If you only use the repositories approved by cannonical, then you are safe. Occaissionally, just like anything else, a bad package might get through. In the last 2 years I have been using Ubuntu, only 1 slipped through for Dapper Drake, and it messed all the vid drivers up. It was easily fixed and within an hour, a new update was out to correct that.
However, if you use multiverse and some universe, as well as 3rd party repositories, Cannonical has posted a warning. If you have activated these, then you should be looking through the updates before installing them.
Just like bashing, be sure you know what you are telling your computer to do before you do it.