Also on both the AMD and Intel images the Mozilla PPAs have not been removed, but they are no longer available or needed, as the the contents of the PPAs have now been moved into the main repository (Thunderbird is now the default email client, so Canonical finally added the latest Firefox and Thunderbird builds to the main repo). Another issue is that you mentioned that when a new release of Ubuntu comes out everyone upgrades and breaks the image. To remove these four PPAs and stop people from breaking the image perform the following 1. Open Update Manager 2. Click Settings 3. Select the Updates tab 4. Change "Notify me of a new Ubuntu version: For long-term support versions" to "Notify me of a new Ubuntu version: Never" 5. Select the Other Software tab 6. Find the four "mozillateam" PPAs and remove them 7. Click Close from Dennis Bellinger dkbellin@uwaterloo.ca
-- PhilipBeldowski - 06 Jun 2012