On the evening of Saturday, September 1, 2012 at 1800 PDT (0100 UTC), http://apex.oracle.com will be upgraded to a pre-release version of Oracle Application Express 4.2.
I know that apex.oracle.com is used by numerous people to host their sample APEX applications and sample plug-ins. I simply wanted to give people ample opportunity to export whatever they wished before the upgrade.
After the upgrade, the applications on apex.oracle.com cannot be imported into an APEX 4.1.1 or earlier instance.
For any issues you believe are directly related to the upgrade, please feel free to post on the OTN discussion forum (preferred) or send an email to firstname.lastname@example.org.