We've been told by IBM (who host the servers that run our search tool) that they're doing maintenance over the next few days. Unfortunately, because of the nature of this maintenance, we've had to disable search in the application for 3 days. You will be unable to search your proofs between Wednesday 17th and Friday 19th April. Any proofs uploaded during this time may also not receive search indexes - if you are affected by this aspect, please let us know and we'll sort it once the maintenance window is past.
We're very sorry about the inconvenience, and also for the short notice.