Comment 1 for bug 366134

That page was doing this:
"SELECT Milestone.active, Milestone.codename, Milestone.dateexpected, Milestone.distribution, Milestone.distroseries, Milestone.id, Milestone.name, Milestone.product, Milestone.productseries, Milestone.summary FROM Milestone"

Which recalls *every milestone ever*. This is a little insane, but we're not seeing a regular timeout now, so I think some other change has fixed it; closing on this basis - we can reopen /open a new one if it does happen again.