The underlying problems aren't completely fixed yet, so I'm leaving this bug open. We temporarily reconfigured things so that we could push keys generated over the last two weeks to a different set of keyservers that has fewer operational problems. However, until the deployment of those keyservers is tidied up, Launchpad hasn't been pointed at them permanently, and so newly-generated keys may still go missing.
Once the new keyservers are properly deployed, we'll do another catch-up push, and then hopefully things should be stable from there.
The underlying problems aren't completely fixed yet, so I'm leaving this bug open. We temporarily reconfigured things so that we could push keys generated over the last two weeks to a different set of keyservers that has fewer operational problems. However, until the deployment of those keyservers is tidied up, Launchpad hasn't been pointed at them permanently, and so newly-generated keys may still go missing.
Once the new keyservers are properly deployed, we'll do another catch-up push, and then hopefully things should be stable from there.