Changes in ECL permission defaults starting in R5.0.2
You will be affected if you are setting up the Notes client without being configured from the Domino Server. In this case you are running client setup in a Island (disconnected) location. You will need to modify your ECL entries to conform with your existing ECL Security model. This can be done manually or automatically in several ways.
You could also be affected if you are using your Notes ID for the very first time in a shared workstation environment. This is applicable when more than one user shares the same Notes Client on the same workstation. The very first time a Notes ID is used, Security Options in the form of ECL entries are generated for that user and stored in the file desktop5.dsk, if the options do not already exist. All the standard ECL rules apply.
Regardless of how you deploy ECLs, Lotus recommends you see the Release Notes document "Recommendations for deploying tighter ECLs" for more details.