Do I have any way of knowing about errors or potential problems when designing my Customer Portal pages?
Oracle Service Cloud, all versions
The Customer Portal development area includes messages regarding important errors, warmings and notifications. From the Customer Portal admin page (i.e. https://<vhostname>.custhelp.com/ci/admin) > select View Development Area. Select the "Customer Portal Development Area" bar at the top to expand the Errors and Warnings listing.
Collapsed notification window (click to enlarge)
These messages are meant to give developers useful debugging and widget information:
Expanded notification window (click to enlarge)
For more information on handling compatibility warning messages, refer to current Documentation for Oracle Service Cloud Products.