Tomorrow we will be upgrading all FogBugz On Demand accounts to version 8.14.90. We will be gradually leaking the release to accounts starting at 12:00 pm EDT (1600 UTC) and finishing by 5:00 pm EDT (2100 UTC). You shouldn't see any impact while this occurs.
The upgrade contains only a single infrastructure change. There are no customer-facing changes and the upgrade will require no downtime.