We've got an ASP.NET 2.0 application that runs on 1 Windows 2003 Server. For the most part it works fine. However, we do have a situation in which often users will attempt to log in and immediately get an error message informing them that their authentication ticket has timed out. It does happen enough to not be a coincidence, and it is definately a nuisance. We're using Forms Authenciation with Active Directory in this ASP.NET app. As I've already said, this runs on a single Windows 2003 Server - there is no web farm involved. I don't know if this matters or not, but the server does have 4 processors. Here's an example of what is in the event log:
Event Type: Information
Event Source: ASP.NET 2.0.50727.0
Event Category: Web Event
Event ID: 1315
Date: 8/19/2009
Time: 10:57:14 AM
User: N/A
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