We will have a scheduled maintenance window tonight from 7pm to 11:00pm PDT. This is being tracked in master bug 456442. The following changes will take place:

7:00pm PDT (0200 UTC) support.mozilla.com updates. We’ll be updating support.mozilla.com to pick up code updates. No downtime is expected.
7:00pm PDT (0200 UTC) spreadfirefox.com updates. We’ll be updating spreadfirefox.com [...]

(This work was originally scheduled two weeks ago but postponed a couple times to accommodate build and release related activities.)

A note about an upcoming maintenance window -
We need to take our LDAP infrastructure offline for two hours tomorrow night, which will affect everything that uses LDAP for authentication, including Hg and SVN.
We’ll also use that [...]

(Apologies for the delayed posting… been holding off until I had more authoritative information.)
At around 3:30am PDT, Mozilla’s primary datacenter in San Jose went offline.
From initial conversations with CRG West, we learned they had a catastrophic HVAC failure at 2:46am PDT.  CRG West later reported,
“…service interruption that affected customers at the Market Post Tower data [...]

We will have a scheduled maintenance window tonight from 7pm to 11:00pm PDT. This is being tracked in master bug 455896. The following changes will take place:

7:00pm PDT (0200 UTC) addons.mozilla.org updates. We’ll be updating addons.mozilla.org to pick up code updates. No downtime is expected.
7:00pm PDT (0200 UTC) MDC / developer.mozilla.org updates. We’ll be [...]

We will have a scheduled maintenance window tonight from 7pm to 11:00pm PDT. This is being tracked in master bug 455530. The following changes will take place:

7:00pm PDT (0200 UTC) support.mozilla.com updates. We’ll be updating support.mozilla.com to pick up code updates. No downtime is expected.
7:00pm PDT (0200 UTC) addons.mozilla.org database work. addons.mozilla.org will be [...]

A note about an upcoming maintenance window –
We need to take our LDAP infrastructure offline for two hours this week, which will affect everything that uses LDAP for authentication, including Hg and SVN.
We’ll also use that same time to take cvs.mozilla.org offline for maintenance.
During this time, anonymous checkouts via http/https [...]

We will have a scheduled maintenance window tonight from 7pm to 11:00pm PDT. The following changes will take place:

7:00pm PDT (0200 UTC) addons.mozilla.org DNS change. As part of our CDN trial/test, we’ll be offloading addons.mozilla.org to CDNetworks and pushing a DNS change to make that active. See bug 450745 for details. No downtime is expected.

Please [...]

We will have a scheduled maintenance window tonight from 7pm to 11:00pm PDT. The following changes will take place:

7:00pm PDT (0200 UTC) duration 4 hours: Red Hat 5 upgrades.  We’ll be picking up OS upgrades on several machines tonight.  The following services/hosts will be affected:

cvs-mirror.nl.mozilla.com
doctor.mozilla.org
despot.mozilla.org

Please let me know if you have any reason why we [...]

We will have a scheduled maintenance window tonight from 7pm to 11:00pm PDT. This is being tracked in master bug 453325. The following changes will take place:

7:00pm PDT (0200 UTC) support.mozilla.com updates. We’ll be updating support.mozilla.com to pick up code updates. No downtime is expected.
7:00pm PDT (0200 UTC) tinderbox.mozilla.org updates. We’ll be updating tinderbox.mozilla.org [...]