I've double checked, upgrades from Oneiric to Precise should have been mostly safe. Oneiric started out with Onboard 0.95.1, but 0.96.1 arrived with SRU lp:880085 in oneiric-updates. Going through Onboard 0.95->0.96->0.97 doesn't trigger this bug. I guess that's the main reason we haven't heard of this problem before. Asking for a SRU seems less necessary for now. We're prepared anyway, though, just in case.
I've double checked, upgrades from Oneiric to Precise should have been mostly safe. Oneiric started out with Onboard 0.95.1, but 0.96.1 arrived with SRU lp:880085 in oneiric-updates. Going through Onboard 0.95->0.96->0.97 doesn't trigger this bug. I guess that's the main reason we haven't heard of this problem before. Asking for a SRU seems less necessary for now. We're prepared anyway, though, just in case.