Comment 12 for bug 289952

Bug 773823 was marked as a duplicate of this bug. I am not sure the use cases are really the same. For one thing, in the former case, the symptom is that the upgrade *fails*. In the latter case (this bug), the reported symptom is that the upgrade succeeds, but forces one to use official (external) mirrors. (Also, 773823 deals with upgrades *from* lucid, while this deals with upgrades *to* lucid. I suspect the root cause is different between these cases.)