So I'm confused as to how this could have been fixed already in precise, given that the changes in DistUpgradeViewGtk3.py to support this were backed out as a result of the 1:0.156.14.5 security update. It's possible that when Adam tested, he did so against the right (precise-proposed) release-upgrader tarball to allow this to work, but that's definitely all superseded now by the security update - hence the new SRU upload.
A diff against precise-updates confirms that 1:0.156.14.2 is not part of the revision history of the currently published package. Hence the new SRU.
So I'm confused as to how this could have been fixed already in precise, given that the changes in DistUpgradeView Gtk3.py to support this were backed out as a result of the 1:0.156.14.5 security update. It's possible that when Adam tested, he did so against the right (precise-proposed) release-upgrader tarball to allow this to work, but that's definitely all superseded now by the security update - hence the new SRU upload.
A diff against precise-updates confirms that 1:0.156.14.2 is not part of the revision history of the currently published package. Hence the new SRU.