Comment 5 for bug 589068

OK, after racking my brains with wgrant, I found that all the examples of successful builds without timestamps that we know of, finished around: 20100602-1154

For example:
https://launchpad.net/~falk-t-j/+archive/lucid-latest/+build/1768191
https://edge.launchpad.net/~ubuntu-mozilla-daily/+archive/ppa/+build/1768594
https://edge.launchpad.net/~ubuntu-mozilla-daily/+archive/ppa/+build/1768591
https://edge.launchpad.net/~ubuntu-mozilla-daily/+archive/ppa/+build/1768601

which indicates that when the rollout started, perhaps data was not properly replicated.

But anyway, it means we can fix this error message itself trivially :)