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by blippe 4440 days ago
It is by design!

Upgrades between LTS releases are not enabled by default until the first point release, 14.04.1, scheduled for July. It is recommended that most LTS users wait until then before upgrading to 14.04. You could add a '-d' flag if you're in a hurry!
1 comments
mrinterweb 4440 days ago
I used the '-d' flag and the release that it showed was the development release. I tried to proceed with the 14.04 development upgrade, but the upgrade failed.
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