You can get an error when trying to browse your SharePoint 2010 Foundation site on iPhone or Safari 5.0 browser. The symptoms: when you navigate to your Web site using its URL as http://mightysharepointsite.com or something you will get the following very descriptive error " Unexpected error - Correlation ID: 1abc234d-ab5c-6789-012a-a1b2c34de5fg Date and time: 03/08/2010 12:54:09 PM ". This error actually means: " System.ArgumentException: Item does not exist. It may have been deleted by another user. at Microsoft.SharePoint.SPList.GetItemById(String strId, Int32 id, String strRootFolder, Boolean cacheRowsetAndId, String strViewFields, Boolean bDatesInUtc) at Microsoft.SharePoint.SPList.GetItemByIdSelectedFields(Int32 id, String[] fields) at Microsoft.SharePoint.SPWeb.GetListItem(String strUrl, Boolean bFields, String[] fields) at Microsoft.SharePoint.Utilities.SPMobileUtility.GetMobileFileUrl(String absolutePath, SPWeb web) at Microsoft.SharePoint.Utiliti