After the migration to the new server, you may need to restart your web browser in case it had cached the old address.
UPDATE
[2012-05-03 20:55:59 | Robert McNicholas]
The transition to the new server and wiki software has been completed. Most wikis are up, though the Spectrum Sharing wiki is awaiting a fix by its owner.
Unfortunately, due to a delay in receiving the new SSL certificate from Comodo, the new server does not yet recognize wiki.eecs as an allowed SSL name. We expect to receive the certificate in the morning, and this article will be updated when that occurs. Until then, it is safe to accept the current certificate for “apps.eecs.berkeley.edu”.
UPDATE
[2012-05-04 10:15:40 | Robert McNicholas]
A new SSL certificate was installed and wiki.eecs is fully back in service. Please report any problems to help@eecs.berkeley.edu.
Resolved as of 2012-05-04 10:13:00