These have already been answered on the main site. You can find your answer regarding this on [this question](http://askubuntu.com/questions/20119/how-do-i-subscribe-to-a-bug) and [here](http://askubuntu.com/questions/5347/how-can-i-get-bug-reporting-help?rq=1). They describe how you can follow a bug and how you can help resolve bugs.