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This XML file does not appear to have any style information associated with it. The  
document tree is shown below.

<ows:ExceptionReport xmlns:xsi="" 
xmlns:ows="" version="1.0.0" 
<ows:Exception exceptionCode="NoApplicableCode">
java.util.IllegalFormatConversionException: d != java.lang.String d != java.lang.String

In the console I am not getting any errors only mimetype warnings and my wms layer isn't showing up on my base map, but it is being read in. So either I need to add something into Geoserver or I need to manually alter the styles which I will need to do in my leaflet code.

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you need to post more of the error message before we can even try to help – iant Nov 26 '12 at 15:01
I once saw something similar with a WFS GET request to GeoServer - the client passed in an XML fragment for the <filter> parameter and GeoServer got upset because filter was namespaced (<ogc:filter>) but because the fragment didn't include namespace declarations GeoServer couldn't figure out what ogc: meant. It would be helpful if you could use Fiddler or similar and update your question with the full set of request parameters. – tomfumb Nov 26 '12 at 17:16

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