Find a bug?
When reporting remember to indicate the hardware used to test. If you used a virtual machine, note it. See this page on reporting bugs for help. Not sure which package to file against? See Finding the right package and the chart below for help. Unsure how to report a bug from a vm or non-connected machine? See this page.
For problems encountered ... ... during the installation itself: ubuntu-bug ubiquity ... while booting the ISO image: ubuntu-bug syslinux ... while booting the system after installation: ubuntu-bug grub2 ... with the graphical display after installation: ubuntu-bug xorg ... with rescue mode: ubuntu-bug friendly-recovery ... with an application: ubuntu-bug PACKAGE_NAME