The JUNE CTP release of the .NET Frameworks 3.0 presents two known issues with CardSpace: 1. There is a failure to validate some SSL certificates. This failure causes the CardSpace user interface to briefly flash and disappear[NW] and the following message will be written to the application event log: The description for Event ID ( 259 ) in Source ( Microsoft.InfoCards.Diagnostics 3.0.0.0 ) cannot be found. The local computer may not have the necessary registry information or message DLL files to