When reporting a bug you should (specially in beta) make sure that you are using the latest package versions available from the Ubuntu servers.
Since 12.04 beta 2 release as a CD, packages have been already updated with fixes on the servers.
The CD images are not constantly updated (unless we are talking about a daily image, but these also can be missing some updates right after download). You need to update your system before successfully reporting a bug.
Do that by opening a terminal and typing
sudo apt-get update && sudo apt-get upgrade.
Make sure that the bug you where going to report is still present on the new packages, a more recent package update might have already fixed it.