WTF?

Solution:

Unmark the auto adjustment

EDIT:

While I blogged this I had the same issue on my blog. Here is the snapshot of the event log

Event code: 3005   
Event message: An unhandled exception has occurred.   
Event time: 10/31/2010 2:11:48 AM   
Event time (UTC): 10/31/2010 12:11:48 AM   
Event ID: 2da507c58aa84c7b8ed29e8fbf3908bc   
Event sequence: 496   
Event occurrence: 9   
Event detail code: 0   

Application information:   
    Application domain: /LM/W3SVC/4/ROOT-1-XXXXXXXXXXX   
    Trust level: Full   
    Application Virtual Path: /   
    Application Path: X:\xxxxxxx\lennybacon.com\www\   
    Machine name: DEVPLEXHQ   

Process information:   
    Process ID: 4212   
    Process name: w3wp.exe   
    Account name: NT AUTHORITY\NETWORK SERVICE   

Exception information:   
    Exception type: ArgumentOutOfRangeException   
    Exception message: Specified argument was out of the range of valid values.  
Parameter name: utcDate   

Request information:   
    Request URL: [http://lennybacon.com/FormatPage.aspx
      ?path=SiteConfig/pageerror.format.html](/FormatPage.aspx
        ?path=SiteConfig/pageerror.format.html)   
    Request path: /FormatPage.aspx   
    User host address: XX.XX.XX.XX  
    User:    
    Is authenticated: False   
    Authentication Type:    
    Thread account name: NT AUTHORITY\NETWORK SERVICE   

Thread information:   
    Thread ID: 18   
    Thread account name: NT AUTHORITY\NETWORK SERVICE   
    Is impersonating: False   
    Stack trace:    at System.Web.HttpCachePolicy.UtcSetLastModified(
    DateTime utcDate)  
   at System.Web.HttpCachePolicy.SetLastModified(DateTime date)  
   at newtelligence.DasBlog.Web.Core.SiteUtilities
    .GetStatusNotModified(DateTime latest)  
   at newtelligence.DasBlog.Web.Core.SharedBasePage.NotModified(
    EntryCollection entryCollection)  
   at newtelligence.DasBlog.Web.Core.SharedBasePage.Page_Load(
    Object sender, EventArgs e)  
   at System.Web.UI.Control.OnLoad(EventArgs e)  
   at System.Web.UI.Control.LoadRecursive()  
   at System.Web.UI.Page.ProcessRequestMain(
    Boolean includeStagesBeforeAsyncPoint, 
    Boolean includeStagesAfterAsyncPoint)