The mozilla-central → mozilla-aurora source migration is TOMORROW (2011-05-24) @ 10:00 am PDT.
This means that fixes for the next version of Firefox need to be in mozilla-central before 10:00 am PDT!
Previously the source migrations happened early in the morning. Developers were staying up late to get their last minute fixes in. Starting the source migration at 10:00 am PDT should make it so PDT and EDT developers don’t have to stay up late at night. If the timing works we’ll keep it consistent so developers will know what time to expect in the future.
Any fixes landed after 10:00 am PDT will need to wait for the next source code migration. Do not ask for exceptions as none will be granted.
For more details on the Mercurial “war room” we are having for the actual repository mechanics, see this post to the dev-planning newsgroup.
Also, please remember the source migration date may be different than the date an update is offered to channel users.