As Joel Kallman posted apex.oracle.com upgraded to APEX 4.0, version 4.0.0.00.46. To do this we ran a one-off patch on apex.oracle.com.
This patch caused the Websheet Data Grids and Reports to be lost.
Therefore, if you had defined a Data Grid or SQL Report previously, you will need to recreate them. This information can't be recovered.
We apologize for any inconvenience this may have caused.
Rest assured that this was caused by the one-off patch and will have no impact on the APEX 4.0 Production Release once available, or any future patches or releases.