>>Sorry, I should have looked more closely at your code.
>>You can't use it in that way. As per the link RequestValidationType Property is simply defined as an attribute of HttpRuntimeSection:
>>http://msdn.microsoft.com/en-us/library/system.web.configuration.httpruntimesection.requestvalidationtype.aspx
>>You need a class such as this:

Public Class MyRequestValidator
>>	Inherits System.Web.Util.RequestValidator
>>	Protected Overrides Function IsValidRequestString(context As HttpContext, value As String, requestValidationSource__1 As System.Web.Util.RequestValidationSource, collectionKey As String, ByRef validationFailureIndex As Integer) As Boolean
>>		validationFailureIndex = 0
>>
>>		'Spurious rejection test
>>		If requestValidationSource__1 = RequestValidationSource.RawUrl AndAlso value.Contains("Default") Then
>>			Return False
>>		End If
>>
>>
>>		Return MyBase.IsValidRequestString(context, value, requestValidationSource__1, collectionKey, validationFailureIndex)
>>	End Function
>>End Class

and then reference that in web.config.....
>
>Thanks, so basically, the class was good but a reference was still needed in Web.Config.

Yep. Remember that you can use different versions of web.config at different levels in a web site hierarchy which would allow you to fine tune by using different rules for different areas if required