I have a "Logout" item in my DNN menu which points to:
http://dev-server/DNN/3.0.13/Admin/Security/Logoff.aspx?tabid=36

When I click it, the user is logged out.  However when i login as host and take a look at the Log Viewer I see the following error occurs everytime someone logs out using that link.  Any ideas?

AssemblyVersion: 03.00.13
Method: DotNetNuke.Framework.PageBase.get_PageCulture
FileName: C:\Inetpub\wwwroot\dnn\3.0.13\components\Shared\PageBase.vb
FileLineNumber: 63
FileColumnNumber: 7
PortalID: -1
PortalName:
UserID: -1
UserName:
ActiveTabID: -1
ActiveTabName:
AbsoluteURL: /DNN/3.0.13/Admin/Security/Logoff.aspx
AbsoluteURLReferrer:
ExceptionGUID: 9214704d-8299-4fce-9080-9251a597c1fa
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
InnerException: Object reference not set to an instance of an object.
Message: DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Framework.PageBase.get_PageCulture() in C:\Inetpub\wwwroot\dnn\3.0.13\components\Shared\PageBase.vb:line 63 at DotNetNuke.Framework.PageBase.OnInit(EventArgs e) in C:\Inetpub\wwwroot\dnn\3.0.13\components\Shared\PageBase.vb:line 93 at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Page.ProcessRequestMain() --- End of inner exception stack trace ---
StackTrace:
Source: