Failed to fetch in 10.10 upgrade

[Robbyx]

Fail to fetch 2 ppa.launchpad.net addresses and another cause the upgrade to terminate. The error messages suggest some type of network error. Should I wait a week and try the upgrade again?

[mörgæs]

As far as I know, PPA's can not be active during upgrade. You must disable them, upgrade and then enable them again (if needed) in the new release.