Event Type: Information
Event Source: ASP.NET 2.0.50727.0
Event Category: Web Event
Event ID: 1316
Date: 11/12/2008
Time: 9:51:35 AM
User: N/A
Computer: XXXXX
Description:
Event code: 4009
Event message: Viewstate verification failed. Reason: The viewstate supplied failed integrity check.
Event time: 11/12/2008 9:51:35 AM
Event time (UTC): 11/12/2008 2:51:35 PM
Event ID: 6c818bfe51c8496ba687c4542482cf1a
Event sequence: 3971
Event occurrence: 24
Event detail code: 50203

Application information:
Application domain: /LM/W3SVC/1/Root/forum-2-128708933906593910
Trust level: Full
Application Virtual Path: /forum
Application Path: XXXXXX\forum\
Machine name: XXXXX

Process information:
Process ID: 5644
Process name: w3wp.exe
Account name: NT AUTHORITY\NETWORK SERVICE

Request information:
Request URL: http://www.XXXXXXXXXXX.c...Default.aspx?g=register
Request path: /forum/Default.aspx
User host address: XXXXXXXXXXXx
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITY\NETWORK SERVICE

ViewStateException information:
Exception message: Invalid viewstate.
Client IP: XXXXXXXXXXXXXXXXX
Port: 3595
User-Agent: Mozilla/4.0 (compatible; MSIE 4.01; Digital AlphaServer 1000A 4/233; Windows NT; Powered By 64-Bit Alpha Processor)
PersistedState: /wEPDwUKMTc3MDU3NDY3Mw9kFgICAw9kFgICAQ9kFgJmD2QWHGYPFgI................
Referer: http://www.XXXXXXXXXXXX....forum/yaf_register.aspx
Path: /forum/Default.aspx

Custom event details:

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.