Search for a user in admin mode without entering any search criterias - crash with the following stack trace: [ArgumentNullException: Value cannot be null. Parameter name: user] System.Web.Security.MembershipUserCollection.Add(MembershipUser user) +2298567 EPiServer.Security.WindowsMembershipProvider.GetAllUsers(Int32 pageIndex, Int32 pageSize, Int32& totalRecords) +183 EPiServer.Security.MultiplexingMembershipProvider.b__6(MembershipProvider provider, Int32 providerPageIndex, Int32 providerPageSize, Int32& providerMatchingRecords, MembershipUserCollection& providerResults) +16 EPiServer.Security.MultiplexingMembershipProvider.AggregateProviderResults(Int32 pageIndex, Int32 pageSize, Int32& totalRecords, PageRetrieverDelegate pageRetriever) +131 EPiServer.Security.MultiplexingMembershipProvider.GetAllUsers(Int32 pageIndex, Int32 pageSize, Int32& totalRecords) +112 System.Web.Security.Membership.GetAllUsers(Int32 pageIndex, Int32 pageSize, Int32& totalRecords) +65 EPiServer.UI.Admin.SearchUsers.BindData(Int32 page) +637 EPiServer.UI.Admin.SearchUsers.Search_Click(Object sender, EventArgs e) +7 EPiServer.UI.WebControls.ToolButton.OnClick(EventArgs e) +101 EPiServer.UI.WebControls.ToolButton.RaisePostBackEvent(String eventArgument) +132 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102