Resolved -
The background worker has caught up, and crate publishes are now updating normally in both indexes.
Feb 12, 19:46 UTC
Identified -
The crates.io background worker is having a bad morning, and a backlog of Git index updates has accumulated. We have given the worker some coffee and it's catching up, but index updates for newly-published crates are running about an hour behind right now.
The sparse index (used by default by all modern Rust versions) is unaffected.
Feb 12, 19:36 UTC