Error message trying to submit exceptions

I often get the following error message and can't submit exceptions:

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Error submitting exception
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Error submitting exception to ITN:
System.Xml.XmlException: There is an invalid character in the given
encoding. Line 8, position 144.

at System.Xml.XmlScanner.GetChars(Byte[] srcBuffer, Int32& srcOffset,
Int32 srcLen, Char[] destBuffer, Int32 destOffset, Boolean zeroedOut)

at System.Xml.XmlScanner.Read()

at System.Xml.XmlScanner.ScanLiteral()

at System.Xml.XmlTextReader.SetLiteralValues(XmlAttributeTokenInfo fld)

at System.Xml.XmlTextReader.SetAttributeValues()

at System.Xml.XmlTextReader.ParseElement()

at System.Xml.XmlTextReader.Read()

at System.Xml.XmlValidatingReader.ReadWithCollectTextToken()

at System.Xml.XmlValidatingReader.Read()

at System.Xml.XmlLoader.LoadCurrentNode()

at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc)

at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean
preserveWhitespace)

at System.Xml.XmlDocument.Load(XmlReader reader)

at System.Xml.XmlDocument.Load(Stream inStream)

at JetBrains.ExceptionReport.ITNProxy.GetSCR(String productname, Int32
id, IWebProxy proxy) in
c:\TEMP\tmp14C0.tmp\src\JetBrainsShared\ExceptionReport\ITNProxy.cs:line 120

at JetBrains.ExceptionReport.ITNExceptionSubmitter.SubmitException(String
excString, String excMessage, String excStackTrace, String description,
String itnUserName, String itnPassword, Int32 buildNumber, String osVersion,
IWebProxy proxy) in
c:\TEMP\tmp14C0.tmp\src\JetBrainsShared\ExceptionReport\ExceptionSubmitter.c
s:line 126

at
JetBrains.ExceptionReport.ITNExceptionSubmitter.SubmitException(Exception e,
String description, String userName, String password, Int32 buildNumber,
IWebProxy proxy) in
c:\TEMP\tmp14C0.tmp\src\JetBrainsShared\ExceptionReport\ExceptionSubmitter.c
s:line 83

at JetBrains.ExceptionReport.ExceptionReportForm._btnSubmit_Click(Object
sender, EventArgs e) in
c:\TEMP\tmp14C0.tmp\src\JetBrainsShared\ExceptionReport\ExceptionReportForm.
cs:line 444
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OK
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