Here's an interesting issue we've seen a couple times in the past few months. Thanks to John Behneman for bringing this to my attention:
Issue: When using RTSPS and a 3rd party Certificate Authority some clients may receive the following error message during a refresh after a user login:
The revocation function was unable to check revocation because the revocation server was offline. Error code: 450260-24C02F2A-80092013
Cause: The SoftGrid client is unable to obtain the Certificate Revocation List (CRL) therefore the connection fails. In most cases this is caused by the local system being unable to utilize a proxy that is required to access resources on the Internet.
Resolution: Provide the local system with machine wide proxy settings so it can validate the CRL. For Windows Vista clients you should use the netsh winhttp set proxy command to configure machine wide proxy settings. For example:
netsh winhttp set proxy proxy-server="http=myproxyserver.company.com"
For Windows XP clients, download and use the Proxy Configuration Tool to set the system settings.
More Information: This is also referenced in the SoftGrid forum at http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=2519682&SiteID=17.
J.C. Hornbeck | Manageability Knowledge Engineer
Here's an interesting issue we've seen a couple times in the past few months.  Thanks to