As of 2010-03-25 (March 25^th, 2010), EdgeSight 5.0 and 5.1 (all service packs) will stop functioning.

Yes, thats right - Citrix have announced that as of 2010-03-25 (March 25th, 2010), EdgeSight 5.0 and 5.1 (all service packs) will stop functioning.

Customers will receive the following error message for payload uploads:

“Archive load error: The archive '/edgesight/app/suser/ZRemoteLib.zpd#12!lsync.htm' is not appropriately signed.  The system cannot find the file specified.”

General symptoms: Payloads will not be uploaded and many of the EdgeSight components will not work properly resulting in different errors.

You may remember this happened last September with Edgesight 4.5 - and you'd be right.

If you're running EdgeSight 5.2 (all service packs) you'll be fine, but if you've got EdgeSight 5.0 and 5.1 (all service packs) you must update both server and agent components to EdgeSight 5.2 or later. 

And when you do, install the server component first, then apply the agent installation to all devices. Older agents can report successfully to a newer EdgeSight server; however, newer agents cannot report to an older server.