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 display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: The recipient certificate specified is not valid or trusted.

Inner Exception: The X.509 certificate CN=www.fabrikam.com, OU=Domain Control Validated, O=www.fabrikam.com is not in the trusted people store..

To work around this problem, the user needs to import the relying party certificate into the TRUSTED PEOPLE store.  Note: This bypasses the Certifying Authority and puts the responsibility on the user to determine the validity of the certificate. This should not be done on production systems.

2. There is a fault in the CardSpace service that causes it to improperly shut down when idle. Subsequent to this the CardSpace user interface no longer launches, and the service must be terminated using the task manager in order to allow the CardSpace user interface to properly function.