I am running two Umbraco websites, with both being maintained by someone other than me.

Recently, one of them suffered a problem after an unknown change in the admin panel. Rather than displaying a simple slideshow with rotating images on the home page an error at the top of the page read.

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I have checked both the Slideshow.xslt and the SlideshowJS.xslt files we currently have and they match the working versions on one of our other websites, so I can't help but feel that that's not the problem. I checked the stack trace on the home page and found the following errors:

niceurl No node found at '2739' 0.0469947996183873 0.000797

niceurl No node found at '2744' 0.0471640948779803 0.000169

niceurl No node found at '2740' 0.0475817457246661 0.000418

niceurl No node found at '2741' 0.0477409838401249 0.000159

niceurl No node found at '2745' 0.0478935171928276 0.000153

niceurl No node found at '2750' 0.0480435362594967 0.000150

niceurl No node found at '2751' 0.0482030537400703 0.000160

niceurl No node found at '2913' 0.0484002855111474 0.000197

niceurl No node found at '2749' 0.0488011744509428 0.000401

After toying with the xslt files a bit more I tried to save the SlideshowJS.xslt file, only to be given the following error

System.OverflowException: Value was either too large or too small for an Int32.
at System.Convert.ToInt32(Double value)
at System.Double.System.IConvertible.ToInt32(IFormatProvider provider)
at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)
at System.Xml.Xsl.Runtime.XmlQueryRuntime.ChangeTypeXsltArgument(XmlQueryType xmlType, Object value, Type destinationType)
at System.Xml.Xsl.Runtime.XmlQueryContext.InvokeXsltLateBoundFunction(String name, String namespaceUri, IList`1[] args)
at (XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at Root(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at Execute(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at System.Xml.Xsl.XmlILCommand.Execute(Object defaultDocument, XmlResolver dataSources, XsltArgumentList argumentList, XmlSequenceWriter results)
at System.Xml.Xsl.XmlILCommand.Execute(Object defaultDocument, XmlResolver dataSources, XsltArgumentList argumentList, XmlWriter writer, Boolean closeWriter)
at System.Xml.Xsl.XmlILCommand.Execute(IXPathNavigable contextDocument, XmlResolver dataSources, XsltArgumentList argumentList, XmlWriter results)
at System.Xml.Xsl.XmlILCommand.Execute(IXPathNavigable contextDocument, XmlResolver dataSources, XsltArgumentList argumentList, TextWriter results)
at System.Xml.Xsl.XslCompiledTransform.Transform(IXPathNavigable input, XsltArgumentList arguments, TextWriter results)
at umbraco.presentation.webservices.codeEditorSave.SaveXslt(String fileName, String oldName, String fileContents, Boolean ignoreDebugging)

Can anyone here see any reasons as to why this is happening? Any help with this would be much appreciated.