An unexpected failure mode in our database, coupled with a series of unfortunate events, meant that Remember The Milk was in a (mostly) read-only mode for roughly 4 hours beginning 2024-02-01 07:49 UTC.
Due to the nature of the failure—where the website and various endpoints were up, reads were working, and writes would fail intermittently—our monitoring systems (5 independent external and internal systems) didn't alert us to the issue and continued to report that everything was fine, which led to a prolonged downtime.
We apologize for the downtime and have taken measures to ensure this scenario won't happen again.