Alternate Access Mapping error

Issue:- Not able to change any settings in AAM
Error:-
Unexpected end of file while parsing Name has occurred. Line 29, position 13. at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.ParseQName(Boolean isQName, Int32 startOffset, Int32& colonPos)
at System.Xml.XmlTextReaderImpl.ParseElement()
at System.Xml.XmlTextReaderImpl.ParseElementContent()
at System.Xml.XmlLoader.LoadNode(Boolean skipOverWhitespace)
at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc)
at System.Xml.XmlDocument.Load(XmlReader reader)
at System.Xml.XmlDocument.LoadXml(String xml)
at Microsoft.SharePoint.Administration.SPAlternateUrlCollection.HasMissingUrl(String xml)
at Microsoft.SharePoint.Administration.SPContentDatabase.UpdateAlternateAccessMapping(SPAlternateUrlCollection collection)
at Microsoft.SharePoint.Administration.SPAlternateUrlCollection.UpdateAlternateAccessMappingInContent()
at Microsoft.SharePoint.Administration.SPAlternateUrlCollection.Update()
at Microsoft.SharePoint.ApplicationPages.EditOutboundUrlsPage.BtnSave_Click(Object sender, EventArgs e)
at System.Web.UI.WebControls.Button.OnClick(EventArgs e)
at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

This above error comes after installing April Cumulative pack for SharePoint 2007

This is the extract from the article http://support.microsoft.com/kb/973410 , which is included in the August cumulative update http://support.microsoft.com/kb/974982

"You have a Web application that has more than five incoming URLs. You cannot change Alternate Access Mappings (AAM) settings after you install the 2007 Microsoft Office system cumulative update that was released in April 2008"

There is one more article which has the same issue of editing URL's for more than 5 zone entrie, but does not have the parsing error. Still in this article there is no resolution given by MS. http://support.microsoft.com/kb/2000628