Since SP1, I just discovered that loHTTP.ResponseXML has changed behavior in regards to the following.

loHTTP=CREATEOBJECT('Microsoft.XMLHTTP')
loHTTP.Open('GET',lcUrl,.F.)
loHTTP.Send()
loXML=loHTTP.ResponseXML
IF EMPTY(loXML.XML)
   MESSAGEBOX('No XML')
   RETURN .F.
ENDIF
XMLTOCURSOR(loXML.XML,'Temp')

In VFP 7, that was working ok. Now, with SP1, when there is no XML, it does not go in the condition as loXML.XML contains the HTML code.