I just got the most bizarre error from my application (http://www.laajakaistavertailu.fi). As I selected a search term from a listbox and pressed submit, I got the following piece of gibberish back. Does anyone have any idea on what might be going on?
Server Error in '/' Application.
Validation
of viewstate MAC failed. If this application is hosted by a Web Farm or
cluster, ensure that <machineKey> configuration specifies the
same validationKey and validation algorithm. AutoGenerate cannot be
used in a cluster.
Description: An
unhandled exception occurred during the execution of the current web
request. Please review the stack trace for more information about the
error and where it originated in the code.
Exception Details: System.Web.H ...
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