Erro no Site

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Error in: http://www.publico.pt/"target=_blank
Error Message: Illegal characters in path.
Data: 21-03-2010 23:32:24

Stack Trace:
at System.IO.Path.CheckInvalidPathChars(String path) at System.IO.Path.GetExtension(String path) at System.ServiceModel.Activation.HttpModule.ProcessRequest(Object sender, EventArgs e) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)