Hello: I'm using Ubuntu 10.04 through Win XP thru WUBI, and have recently had problems updating through the update manager. I receive the following reply:

Could not download all repository indexes

The repository may no longer be available or could not be contacted because of network problems. If available an older version of the failed index will be used. Otherwise the repository will be ignored. Check your network connection and ensure the repository address in the preferences is correct.

Failed to fetch http://ppa.launchpad.net/mozillateam...86/Packages.gz 404 Not Found
Some index files failed to download, they have been ignored, or old :used instead.

Is their any fix, or time to update to the latest version 12.10?