After many hours of frustration, I finally stumbled upon the solution: put a single space in front of each of the layer "labels." This makes no sense to me, but it works, so I'm am doing it. Previous: <operationallayers> <layer label="Easements" type="dynamic" visible="false" alpha="1.0" url="http://ln534arcgis/ArcGIS/rest/services/Flex_Easements/MapServer"/> <layer label="Cable Injection" type="dynamic" visible="false" alpha="1.0" url="http://ln534arcgis/ArcGIS/rest/services/Flex_Cable_Injection/MapServer"/> <layer label="SDOT Street Classes" type="dynamic" visible="false" alpha="1.0" url="http://ln534arcgis/ArcGIS/rest/services/Flex_SDOT_Street_Classes/MapServer"/> </operationallayers> New, working version: <operationallayers> <layer label=" Easements" type="dynamic" visible="false" alpha="1.0" url="http://ln534arcgis/ArcGIS/rest/services/Flex_Easements/MapServer"/> <layer label=" Cable Injection" type="dynamic" visible="false" alpha="1.0" url="http://ln534arcgis/ArcGIS/rest/services/Flex_Cable_Injection/MapServer"/> <layer label=" SDOT Street Classes" type="dynamic" visible="false" alpha="1.0"url="http://ln534arcgis/ArcGIS/rest/services/Flex_SDOT_Street_Classes/MapServer"/> </operationallayers> After asking a cooworker about this, he suggested maybe a version of IIS? Host environment:ArcGIS Server 9.3 on a Windows 2003, SP2, Virtual Machine) Very curious indeed, but this is what I found ended up working....
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